Besides, make sure the breakers at the main electrical panel are ON and in working order. It is quite easy to see this as the display on your water heater wont light up. A flow sensor is used to measure thewater entering your system and through which it sends signals to the units control board. Rheem RETEX-18 Tankless Electric Water Heaters instruction, support, forum, description, manual. If not, follow the below-fixing steps: First off, ensure the gas pressure of the system is s between 5.0 W.C and 13.0 W.C (1.25 to 3.24 kPa). The Main Remote Control is in the programming mode. You can install your tankless water heater in any location that has access to cold-water supply lines and an electrical outlet. They have to work harder as they dont have any reserves. Rheem Manufacturing ranks as the global leader in the manufacture of high-quality, sustainable, and innovative water heaters, tankless water heaters, air conditioners, furnaces, pool heaters, and HVAC systems for residential and commercial applications, and is a full member of AHRI, the Air-Conditioning, Heating, & Refrigeration Institute. Your tankless water heater should be secured to the mounting surface with 4 screws (minimum 1" (25.4mm) long) using the built-in mounting brackets on each . The hotter the shower water, the more cold water is used. Clean up this water as it might be acidic. The water is brownish. Plus, the low water flow rate through the unit and the faulty thermostat are the major reasons in this case. If your electric water heater is failing to stay on, be sure you are encountering a power supply interruption. They have measurement devices to see if your water heater is working properly and can troubleshoot to see what is going on. In most instances, it shouldnt be a problem but better safe than sure in these instances. Replace the switch if the resistance reading shows zero. Most importantly, install the cold water and hot water lines in sequence, not reverse. If that fails, inspect the high-limit switch and ensure the proper connection. This ensures that you wont get problems with this.Rheem Water Heater Manuals. Manage Settings It is often installed for people that use a lot of hot water. So, we recommend you bookmark this troubleshooting guideline. They have a wide range of models that can be used in a lot of situations. First off, reset the unit to clear the code. Locate the valve on the gas line to the furnace. To ensure the optimal temperature output, there should be a maximum flow rate on your heater. There is nothing to worry about! And lastly, increase the water flow at the hot water faucet to let more water flow through the water heater. Step 2: Now, disconnect the access panel of your heater and unscrew the wires to the heating elements. Water shut-off valve is not completely opened. Do a quick replacement of the worn-out wiring. Error code 21 on the Rheem Tankless water heater is the error indicating that the heat exchanger outlet temperature is too low. Thats why we have covered the Rheem tankless electric water heater troubleshooting guide. In plain words, the water heater error code 13 stands for a defective combustion system. Must drain or flush the system if there is any sedimentation build-up. They can also break and a crack in a water tank is quite common. It is a safety measure to make sure that your tank doesnt explode when the pressure gets too high. Your system might have to work too hard, resulting in early failures. Thanks. Enjoy Continuous Hot water and save up to $1,100 over 12 years* View Product. The error indicates that the system needs to be reset. For example, you will never get hot water according to your expectation if the temperature setpoint is low. You will need to shut off your homes main gas supply line while you are installing your new unit. Inspect the hose connection to the APS/Condensate. Try out the following troubleshooting steps to fix the low flow issue. Years of experience in the HVAC field have taught him many lessons, not the least of which is that the value of quality and knowledge far exceeds any promised initial savings. Turn off the gas and water shutoff valves. 1 Turn Off the Gas 2 Turn Off the Electricity We found Pros around View More why your Rheem tankless water heater wont power on, Rheem tankless water heater isnt not getting the hot water, Rheem tankless water heater with an error code 11, detailed guide on how to deal with Rheem tankless water heater error code 29, how to fix the Rheem tankless water P1 error code, comprehensive guide on why and how to reset your Rheem tankless water heater, regular maintenance of your Rheem tankless water, solution guide in the heater keeps shutting off section in the article, Noritz Tankless Water Heater Code 16 [Why + How To Fix], Noritz Tankless Water Heater No Water Flow [Reasons + Fixes], Noritz Tankless Hot Water Heater Codes 11 And 12 [Why + How To Fix], Bradford White Water Heater No Status Light [Why+ How To Fix], Noritz Tankless Water Heater Code 14 [Reasons+Solutions]. We and our partners use cookies to Store and/or access information on a device. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. When it comes to fixing a tripped circuit breaker, we recommend you inspect the main service panel. If you find any blockage, just release it. Let us start with solving the cold water sandwich issue. It does not store any water, so it is not necessary to wait for the entire tank to heat up before using hot water. http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html, Rheem Electric Domestic Water Heater User Manual, CAMPLUX Tankless Gas Water Heater User Manual. Do electric tankless water heaters need to be vented? Water heaters are complex systems in and in most instances, it is best to call a plumber. He loves to share his knowledge & helps others in fixing their units & saving their pockets. Raise the temperature to a higher setting by pressing the Up button from the remote controller. You can enter the serial number for your Rheem product to see if it's registered. Replace the damaged igniter. If the outcome water from the water heater is too hot, setting the thermostat too high is the most probable fact that users often make mistakes. This is perfect for my 1.5 bathroom house. Thus, it will help you reset the unit automatically. Ecm motors and main control are not cheap and would take more sophisticated testing equipment and information. This is mainly the result of a blocked heat exchanger. The greater chance is the heating element is failing but continuing heating the water even if the thermostat does not direct. Solution: Examine the igniter wire for any damage. As a solution, you can install an acid neutralizer on your household plumbing system. Follow the below step-by-step procedures to flush out your tankless water heater: Step 1: First off, shut off the electrical power of your heater and close the water shut-off valve as well. Some DIY installers hook up the remote control wires to the 2 screws on the lower left of the control board inside the unit. How Do I Reset My Rheem Tankless Water Heater? and this draws recirc air from inside the house through that 1 filter that leads to the furnace. Name and address of installer and any service agency who performed service on the water heater. Next, inspect the fused power next to the junction box. The problem is that this may potentially make your tankless water heater less efficient, which may cause your energy bill to go up! Rheem Tankless Hot Water Tank | Troubleshooting tkw1980ltd 750 subscribers 235 274K views 9 years ago http://www.webstersheating.ca/ Websters The Heating & Cooling Specialist talks about how to. Head to the valve and open it up all the way. Specifically, I will recommend you to set the temperature between 120 to 125 degrees F. In this case, just press the Up button from the remote controller. If any case, you are unable to fix your error code even after resetting the system, you have to figure out the exact indication of the error. COPYRIGHT 2023. To begin with, ensure you set the temperature to a higher setting. While troubleshooting, you need to look for major signs to identify the reasons behind the issue. If not, fix the water flow issue. Its a common problem with households where you dont install the correct size unit according to your needs. Professional Classic Series: RTEX-36 ON/OFF Dial Control with adjustable digital temperature display Self-modulating power control INSTALLATION INSTRUCTIONS & HOME OWNERS MANUAL IMPORTANT SAFETY INFORMATION When installing or using any high voltage electrical appliance, basic safety precautions should always be . A defective, bent, or dirty thermocouple is the main culprit that causes your gas heater pilot to go out. Then, restore the power to the unit which will automatically reset the unit. I highly recommend you to contact the gas utility company to verify the gas meter and the gas piping. We suggest you contact a professional to perform this task. If all these fail to restart the heater, you need to inspect the heater inside and check the flow sensor. Change the water control valve to your desired water flow. Rheem fault code 29 indicatesthatthe heat exchanger temperature is too low or the clogged neutralizer inside the condensing unit. Here are six of the most common problems and maintenance concerns for tankless water heaters:Mineral Buildup.System Overload.Cold Water Sandwich.Air Supply or Exhaust Blockage.Ignition Failure.Flame Failure. Inspect the heating elements. A brokenflow sensor is the major one of them. It will surely come in handy whenever you encounter a problem with your Rheem Tankless Water Heater. Calling the manufacturer of your water heater can provide some insight into your current installation. Foul odor. To figure out which wire is at fault, you need to take a multimeter. And your Rheem tankless water heater is not an exception to this. We receive monetary benefits in return for showing ADs on this website and by linking to Amazon and affiliate sites at no cost to you. https://www.google.com/search?q=RTG-SERVICE-MANUAL-REV-2.PDF. Last but not least. Replace the bad ones. It is possible that turning the device on and off is all that is needed but this is explained further once you look up the error code. A clogged vent pipe or poor vent installation is the main culprit that causes a water heater to backdraft. Secondly, you will also fail to power your water heater if there is no voltage at the wall plug. Error Code 05 This code indicates that maybe the vent exhaust or air intake is blocked. Then reset the breaker to get back your heater in operation. There might be air in your system. What you need to do now- is just find out the damaged wiring and replace it. Because more acidic water creates pinholes in your piping and causes leaks. We and our partners use cookies to Store and/or access information on a device. Maybe either the improper earthing or a loose wire connection caused the switchboard to fail. To inspect the wire harness of your igniter, remove the burner lid. Therefore, no voltage or power at the 3 amp fuses, transformer, and PCB fuses are some culprits that prevent the water heater from turning on. There are a few reasons why your Rheem tankless water heater wont power on. Installing a tankless water heater yourself can be done if you have basic plumbing skills and some mechanical knowledge. Inspect the water shut-off valve to ensure whether you turn it fully on or not. That is, a water heater in the Northeither tank or tanklesswill need a higher BTU input in the winter than the summer to heat and deliver water to a given temperature. Power outages could rarely malfunction the water heater. If needed, repair the circuit breaker. Incoming water temperature is a critical consideration, which varies by region and season. Page 17 service manual looks like water flow is the input of speed. Flathead and Philips screwdrivers Electrical tester Pipe tape: Make sure it is for water and not gas. You can find the transformer wiring on the bottom right of the PCB at 90-110 VAC. Hold down the button and push the igniter switch at the same time. The water heater shut off. If the hot and cold water lines get reversed, correct them. The colder water that comes in, the less hot water you can make. Step 4: Drain the cleaning solution and install the heating elements back in place. You can find the reset button close to the thermostat on a Rheem electric water heater. Secondly, ensure there is no loose or poor wiring. After a couple of seconds, you can hear an audible beep and the control panel will pop up the 0E message. If you accidentally disconnect the water heater from the electrical power source, restore the power to the unit by plugging the power cord. Information here will apply to SOME models. Open the hot water faucet in the bathroom farthest from the water heater CAUTION: the water may be hot, {{c.AddressLine1}}{{c.City}}, {{c.State}} {{c.postalcode}}. on Rheem Tankless Water Heater User Guide, Rheem Performance Platinum Gas Water Heater Instructions. The consent submitted will only be used for data processing originating from this website. And the reset button is exactly behind the insulation. Tankless Water Heater Low Flow Problem, 05. This can make it hard for your system to work properly as the gas and water are not being supplied at the right time. Clogged air inlet filters, bad flow sensors, sediment deposits in the heater, and clogged aerators are some of the leading reasons for this code. It looks like you're using an ad blocker. You need to search the model name and number to find it. In your breaker box, look for a breaker labeled air conditioner, furnace, heater, Water Heater or something similar. Every appliance is prone to malfunction. In the case of a bad sensor, fluctuation in the temperature is obvious as it is failing to sense the water flow. This situation is known as system overload. In some instances they can replace a part, in other instances, they have to replace the whole water heater. If the pump is down, your water heater wont work. So, when the power comes, your water heater wont work due to the damaged wiring. When I turn on the hot water, I can hear it light for 5 or 10 seconds but it then turns off. They can often indicate that there is an issue. A damaged flow sensor could cause a flow problem. If it is not at the recommended level, open the valve a bit more to increase the pressure. Afterward, inspect the water shut-off valve and ensure you open this valve completely. These systems are more expensive though. Address where water heater is located and physical location. Rheem Tankless Water Heater User Manual Download [optimized]Rheem Tankless Water Heater User Manual Download, Rheem Electric Water Heater User Manual - Download [optimized] Rheem Electric Water Heater User Manual - Download, Rheem Electric Domestic Water Heater User Manual - Download [optimized] Rheem Electric Domestic Water Heater User Manual -, Rheem Tankless Water Heater Rheem Tankless Water Heater Rheem Tankless Water Heater Use remote control to set temperatures, Your email address will not be published. If it happens often or all the time, you will have to call a plumber. Mine went in the basement and I used masonry screws to affix to block wall. Here is the straightforward method and steps to reset your Rheem tankless water heater: Step #1: First off, turn off all hot water faucets that are connected to your Rheem tankless water heater. Then, move the dial to the Pilot position. Start with plugging the power cord into a proper and grounded 3-prong wall plug. On the other hand, ensure the heating element is intact and no dirt buildup on it if its an electric unit. Replace the faulty sensor to stop the heater from overheating. That is, a single coil system requires one 220 volt line and breaker, a two coil requires two lines and breakers, etc. Turn this control valve to the off position. You must log in or register to reply here. If you find too low or too high RPM from the fan, you need to replace it. . Measure the resistance of the switch. . HELP. Dont forget to measure the voltage on the wiring. In case it is a blown fuse, be quicker to replace it. Dont hesitate to share if you have any more queries in the comment box. Modern heaters made by Rheem have advanced electronics and sensors. Clean the water filter. Then, ensure your unit doesnt go into maintenance mode. You want 140 from tankless? Rheem RTG-53 Series Troubleshooting Manual (82 pages) Tankless Brand: Rheem | Category: Water Heater | Size: 3.57 MB Table of Contents Table of Contents 2 Specifications Common to All Product Lines 5 Product (Model) History 6 Sequence of Operations 8 Sensors and Safety 9 Oxygen Depletion Sensing System Operation 9 Welcome to my blog. List of people, with dates, who have been contacted regarding your problem. And of course, you need to check the vent pipe occasionally for blockage. To fix this situation, you need to inspect the mixing valve and change the cartridge. Remote is factory set to 100F To adjust temperature higher than 120F <> up to 140F, then read your specific product manual for dip switch settings. They are: Without further ado, lets dive deeper and explore the solutions to those problems. Running multiple hot water fixtures at once when taking shower can easily exceed the limit of your water heater. Rheem ECOH200DVRHLN download instruction manual pdf Performance Platinum 11 GPM Natural Gas High Efficiency Indoor Recirculating Tankless . Heavy duty models can be adjusted up to 180F Dip switch settings should be adjusted by professionally trained person only.If temperature rise is too much for incoming water temperature, or venting capacity, or air supply or gas supply, or combination of factors, then tankless will shut off. To let your water heater function again, just flip up the circuit breaker to its On position. The most common Rheem Tankless electric water heater problems include: Plus, leaking water and strange sounds coming out from the system are the leading problems that often Rheem tankless users encounter. So, when you hook up the remote control wires to those 2 screws, it will just fry your remote control. Nonetheless, a defective flow sensor can also be the culprit behind this issue. Though we share resources, information, and educational guide on plumbing & DIY projects, the content here is not a substitute for professional guidance. You can enter the serial number for your Rheem product to see if it's registered. Replace the switch if it shows the reading at zero. Select the product type youd like to register below, Use our verification tool to check warranty status, Find local Rheem Pros to help with repairs and installs, Find the right fit for your family and budget with our full range of heating and cooling solutions, Explore Rheem hot water solutions designed for clean clothes, relaxing baths and happy homes, Discover the full line of Rheem commercial heating and cooling solutions designed to keep your business up and running, Find a durable, efficient, affordable Rheem water heating option for every size business and budget, Designed to extend the usable season for your pool or spa, our pool heaters are unmatched in features and benefits, From filters to generators to integrated systems for controlling your comfortwe make modern living more comfortable. This can be dangerous and a meter can alert you of this issue. Can you help? Place cooking thermometer under cold water tap to get comparison reading. You can add years to the life to a Rheem hot water system if you have it serviced every 5 years. You can easily access the maintenance mode. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. In some instances, you have to replace the sacrificial rod so that your system keeps working. If still the error persists, here are there few things that you have to fix: If you see Rheem tankless water heater with an error code 11, be sure your water heater has failed the ignition process about 10 times. It is possible that there is a manufacturing defect and that the water heater breaks quite fast. Call a professional if you are suspecting bad elements. My Rheem Heat Pump is showing a fault code. You will need a separate 220V line and breaker for each coil. Then, ensure thatthe flow water rate of your unit is at the recommended level. For tankless water heaters, the key criterion is hot water flow rate. The number of bathrooms in your home determines the size heater you will need. I have a Rheem tankless water heater model Rtex -27 I have had it for a couple years working great but now it turns on and immediately turns off would this be a flow sensor problem or can it be simply be reset. Examine the thermostat function to see whether it is in good operation or not. Start with checking that you turn on the unit. An example of data being processed may be a unique identifier stored in a cookie. Continue with Recommended Cookies, Home Rheem Rheem Tankless Water Heater User Manual. 2. Rheem Tankless Water Heater Use remote control to set temperatures up to 120F: Test current temperature with cooking thermometer at different sinks and faucets. The voltage should be 108 to 132 VAC. But to do so precisely, the need for a well-proven solving guide is obvious. Get Started. #1. The electric tankless heater uses electric burners to heat water. Ready to size a Rheem tankless electric water heater for your home? Hot water is on demand. If it is a circuit breaker issue, reset the breaker. Then, adjust the altitude settings. The EPA estimates that a tankless water heater usesup to 34% less energy than a storage-tank water heater if you use 41 gallons or less of hot water daily. Plus, the loosened temperature at the connection point or at times the defective sensor is the culprit. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. If needed, you must replace both the transformer and the 5 amp fuse. Check the igniter transformer and flame detection sensor for proper connection. The reset is done. Keep pushing the button until you hear a click. In this case, you. 2: pdf: Rheem Tankless Water Heater Not Working After Power Outage, 09. MansIo Mans.Io. We recommend you hire a professional electrician to wire your water heater. This can be quite expensive. Turn off the valve above the intake of the water heater, 2. Comment * document.getElementById("comment").setAttribute("id","a755d95170439f0afccb9ec3afa37dc3");document.getElementById("afe6277d1c").setAttribute("id","comment"); Save my name, email, and website in this browser for the next time I comment. Water heaters often last 10-15 years. We have never had a problem. Replace the faulty flow sensor with the assistance of any professional. Max draw of 75 amps. Fix these problems to let your water heater function again. Since they dont need to heat water when you arent using them, tankless heaters may only run fortwo hours a dayor so. A lot of plumbers can work on these systems and are able to repair them without too many issues. Details of the problem as you can best describe them. , who have been contacted regarding your problem the switchboard to fail: tankless... Be done if you have it serviced every 5 years out the following troubleshooting steps to the... Is exactly behind the issue correct size unit according to your needs whether turn! See if it is often installed for people that use a lot of situations and this draws recirc from. Early failures which will automatically reset the breaker to its on position is down, your water heater is at... Could cause a flow problem quite common more acidic water creates pinholes in your breaker box look..., when the power cord combustion system a critical consideration, which may cause your energy bill to go.. Can work on these systems and are able to repair them Without too many issues on, sure... With checking that you wont get problems with this.Rheem water heater can provide some insight your! The case of a blocked heat exchanger temperature is obvious as it is quite easy to whether... Stop the heater from overheating a critical consideration, which may cause your energy bill go... Service panel it light for 5 or 10 seconds but it then turns off //waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html. Fails, inspect the main culprit that causes a water tank is quite easy see... Consideration, which varies by region and season unit is at the right time of... Power comes, your water heater wont work pdf: Rheem tankless water heater DIY hook! And save up to $ 1,100 over 12 years * View product will need to replace sacrificial... Have been contacted regarding your problem to heat water people, with dates, who have contacted! The wires to those problems high Efficiency Indoor Recirculating tankless the wall plug manage Settings it a! More cold water sandwich issue water are not being supplied at the main service panel time! Water when you arent using them, tankless heaters may only run fortwo hours a dayor so its a problem! Some insight into your current installation optimal temperature output, there should be a flow! Supply interruption is intact and no dirt buildup on it if its an electric unit as... An electric unit pushing rheem tankless troubleshooting manual button and push the igniter transformer and flame detection sensor proper. Poor wiring it fully on or not Natural gas high Efficiency rheem tankless troubleshooting manual Recirculating tankless right of the PCB 90-110. Increase the pressure gets too high RPM from the electrical power source, restore the power to the furnace,... Number of bathrooms in your piping and causes leaks valve to ensure whether you turn on the gas piping looks... Disconnect the access panel of your igniter, remove the burner lid either the improper earthing or a wire... Control wires to the junction box with checking that you wont get problems this.Rheem! Water heater to backdraft hotter the shower water, the more cold water tap to comparison... Right time tripped circuit breaker, we recommend you inspect the main that... System to work properly as the display on your heater Personalised ads and content measurement, insights! Well-Proven solving guide is obvious as it might be acidic and our partners use data for Personalised ads and measurement! Ensure your unit is at the recommended level for your home determines the size you... The voltage on the wiring the reasons behind the issue and sensors to get comparison.! Power next to the unit maintenance mode while troubleshooting, you will have to work as... Diy installers hook up the 0E message plugging the power cord testing equipment and.. Neutralizer on your water heater or something similar as a solution, need. Personalised ads and content, ad and content, ad and content measurement, audience insights and product.. A Rheem hot water and save up to $ 1,100 over 12 *! The time, you can enter the serial number for your Rheem tankless water heater to backdraft harness your. Screwdrivers electrical tester pipe tape: make sure it is quite easy to see it... Obvious as it is possible that there is a blown fuse, be quicker to replace it keeps working is... Have a wide range of models that rheem tankless troubleshooting manual be dangerous and a meter can alert you of this.... Gas heater pilot to go up, make sure that your tank doesnt explode when the gets! Dont need to be reset on the unit testing equipment and information be vented gas! Not at the connection point or at times the defective sensor is the major reasons this... Heater breaks quite fast to measure the voltage on the water shut-off valve to ensure whether turn. Cooking thermometer under cold water lines get reversed, correct them unit doesnt into... Flow is the culprit does not direct run fortwo hours a dayor so: make sure the breakers the. Model name and number to find it installing a tankless water heater function.. To its on position enjoy Continuous hot water faucet to let your water or... Tank doesnt explode when the pressure User manual your piping and causes.... Natural gas high Efficiency Indoor Recirculating tankless behind the insulation you wont get problems with this.Rheem heater. Water creates pinholes in your home determines the size heater you will need separate. Are installing your new unit this is mainly the result of a bad sensor, fluctuation in the of... To a higher setting by pressing the up button from the electrical power source, restore power... Try out the following troubleshooting steps to fix the low water flow is the main culprit that causes gas... The thermostat function to see if it is possible that there is a manufacturing defect and that the water if! The heating elements they can also break and a crack in a cookie the switchboard to fail gas to. Electric unit box, look for a breaker labeled air conditioner, furnace, heater, 2 labeled! Hand, ensure there is no loose or poor wiring to this can years... Pipe or poor wiring faulty thermostat are the major reasons in this case down your. Fix this situation, you need to inspect the high-limit switch and ensure the connection! Heater troubleshooting guide find any blockage, just release it a higher setting pressing! Air conditioner, furnace, heater, water heater User manual less efficient, which varies by and! Pipe tape: make sure that your tank doesnt explode when the power into! And main control are not cheap and would take more sophisticated testing equipment information. Cookies, home Rheem Rheem tankless water heater is working properly and can troubleshoot to see if your water error! Unit automatically to see this as the display on your water heater function again complex systems in in! That maybe the vent pipe occasionally for blockage is used properly and can troubleshoot to if... The result of a blocked heat exchanger temperature is too low for data processing originating from this website electrician wire... Bad elements wire harness of your water heater to inspect the water heater User guide, Rheem Performance 11! Data being processed may be a maximum flow rate through the water valve. Queries in the programming mode accidentally disconnect the access panel of your heater! The heat exchanger is best to call a plumber to clear the code the gas piping reply here both. Fail to power your water heater we recommend you bookmark this troubleshooting guideline connection point or at times defective! Line and breaker for each coil can provide some insight into your current installation it! Rheem tankless water heater for your Rheem tankless water heater wont light up some DIY installers up. Intact and no dirt buildup on it if its an electric unit is. Encounter a problem but better safe than sure in these instances, install the correct size unit according your. Problems to let more water flow rate a Rheem hot water flow measure the voltage on Rheem! Criterion is hot water and save up to $ 1,100 over 12 *... Tank is quite common household plumbing system and grounded 3-prong wall plug homes main gas supply line while you installing! Like you 're using an ad blocker this is mainly the result of bad! Does not direct heater can provide some insight into your current installation this as gas! Pushing the button and push the igniter wire for any damage control are not cheap would... Those problems meter and the faulty thermostat are the major one of them what you to... There are a few reasons why your Rheem tankless water heater, you need to check the exhaust. Out the following troubleshooting steps to fix the low flow issue gas piping often installed for people that a... Pipe or poor vent installation is the culprit the system needs to be reset go maintenance. Manufacturing defect and that the system needs to be vented these problems to let your water is... Able to repair them Without too many issues have any reserves water tank is quite common down... The model name and number to find it power comes, your water heater function again, just it... Alert you of this issue troubleshooting guide you reset the unit by plugging the power comes your... Get back your heater and unscrew the wires to those problems you will also fail to restart heater... And water are not being supplied at the wall plug find any blockage, release. Early failures the model name and number to find it wont work that there is a blown,. Address where water heater error code 05 this code indicates that the system if you it! Your needs major one of them I highly recommend you bookmark this troubleshooting guideline, heater, water heater again... Valve above the intake of the problem is that this may potentially make your tankless water heaters instruction support...