Turn the dial from the vacation settings to the hottest settings seven times. Your tankless water heater may run hot and cold due to a broken flow sensor. Use a match or candle flame or smoke. The good thing about these heaters is that they wont work before filling the tank with water. Do not attempt to remove the inner door. Shut off the cold water supply and empty the tank by attaching a hose to the drain valve and running it outside. Wear protective gear if possible to cover your eyes, hands, and body. However, this issue can also be the result of the ECO getting tripped. It indicates that the pressure switch is stuck closed. Save my name, email, and website in this browser for the next time I comment. Water Heaters. The knob needs to be depressed to light the water heater. If it goes out, repeat steps 3 to 9. Otherwise, you may face a lot of issues with it. I have a newly installed RTEX - 18 Rheem tankless water - JustAnswer Open the drain. FV sensor detected presence of flammable vapors. Water temperatures above 125oF can cause severe burns or death from scalding. If the issue still remains, the gas control thermostat is the most likely culprit here. The most likely culprit behind it is a faulty thermal well. This helps conserve energy and prevent a build-up of dangerous hydrogen gas. . This helps conserve energy and prevent a build-up of dangerous hydrogen gas. When the faucet is opened, the water flows through the Richmond Tankless Water Heater, which heats it to the temperature youve digitally set. Let us know what turned out to be the problem. Tank -vs- Tankless Water Heaters Mechanical Hub 1.6M views 5 months ago Easiest Way To Light A Gas Water Heater Pilot Light Everyday Home Repairs 90K views 1 year ago Best Residential. This results in a lack of combustible air and results in incomplete combustion. Definitions of Rheem tankless water heater error codes Rheem fault code 00 - Indicates 1-hour continuous combustion. Shut off the water heater if you notice any unusual burner operation, until you obtain qualified service assistance. Hot surface ignitor not positioned correctly. Click here to browse our residential tanks! The water is available throughout the year. Allow the tank to fill with water before you turn the power of the water heater. The high resistance caused by a loose wire produces a substantial amount of heat that can eventually cause fires. Incorrect Gas Pressure 3. An electrical spark from any nearby source could be enough to produce an explosion. If that doesnt work, you have a faulty lower thermistor, and replacing it is the only solution in that case. Make sure that the wiring of the pressure switch is okay. Low gas pressure could also be the cause of the problem. We receive monetary benefits in return for showing ADs on this website at no cost to you. FVIR stands for Flammable Vapor Ignition Resistant. Otherwise, the heating element may go bad one more time. Replace the combination gas control (thermostat). Corrosion or Scale Deposit On Heat Exchanger FAQs: What are the most common problems with tankless water heaters? It indicates water temperature sensor failure, It indicates Combination Gas Control failure.
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