20 Most Recent Rheem RTG-66DVN Direct Vent Natural Gas - Page 7 Questions & Answers

replace it with a new one

If cold water has good pressure, and you are not on a well ,try turning water Off to water heater,open tap to relieve pressure remove hot side left water line to heater stick long screw driver inside pipe going inside water ,the heat trap is sticking it's rubber flap inside the pipe going in water heater.

It shows that the pilot is alight .

Errors following link: http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Model number appears on label located on side of heater... http://waterheatertimer.org/Figure-Volts-Amps-Watts-for-water-heater.html If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

The FV lockout varies by brand of heater... some require simple cleaning, while Rheem requires part Following link has rundown for various models: http://waterheatertimer.org/troubleshoot-flammable-vapor-on-gas-water-heater.html Burner going out could be FV lockout, low gas pressure, or gas control valve thermostat: Following link has troubleshoot for pressure and various models of gas control: http://waterheatertimer.org/troubleshoot-gas-water-heater-thermostat.html If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Under the water heater should be on 1/2 feed .

Malfunction of Air IntakeFilter Switch

Remedies:
Make sure air filter door is properly seated.
Make sure front panel is properly installed.

Usually if they won't re-light it's a problem with the orifice on the pilot itself. The thermocouple won't cause it to re-light but it will prevent it from staying on after being lit. Just make sure you have valve set to pilot when you press the red button down to light. You can take out the burner by removing the gas and thermocouple lines, unscrew the orifice and use like a wire brush bristle to clean out the hole in the orifice.