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No flame on my gas water heater

How to troubleshoot and find the cause

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  • Water Heaters Master
  • 5,245 Answers

1) Copy following link to troubleshoot by type of gas control.
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html#intellivent

2) Clean air intake, and check if air intake is clogged, causing overheating caused by reduce air intake and slowed exit of combustion by-product up the vent.
http://waterheatertimer.org/How-to-repair-Rheem-TRD.html

3) Post question on pro water heater forum:
http://www.thetankatwaterheaterrescue.com/forums/forum3/

Posted on Dec 03, 2012

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4 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 14 Answers

SOURCE: Rheem water heater, will start but flame lasts 10 seconds

Is the vent fan working well and can you feel unobstructed air out the termination fitting outside?

Posted on Apr 05, 2009

  • 129 Answers

SOURCE: I do not have a flame for my water heater. I have

the thermocouple needs to be replaced.

Posted on Sep 26, 2009

motor1258
  • 6674 Answers

SOURCE: I have a 6 gallon

Your on right track. When this happens and small flame still there, pull wire(s) off at gas valve, or test for voltage from ECO to gas valve. No voltage, then there should be no gas. Change gas valve.

Posted on Oct 20, 2010

Testimonial: "Changed the gas valve, now heater works as it should, No fumes and no flame after shutoff."

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1 Answer

My Rinnai tankless water heater keeps tripping the breaker then when turned back on, it begins to beep and displays a code 12. What is causing this? It is new and this is the first time any code came.


Go to Rinnai and get a manual with the error codes... for example a shorted element will trip breaker... wiring problems can cause breaker to trip... anything that causes heat on wire to exceed amp rating of breaker will cause it to trip...
http://waterheatertimer.org/Water-heater-is-tripping-breaker.html

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I have a Bosch gas tankless water heater, model GWH 425 EF. The igniter does not stop sparking once the flame is lit. What will cause this?


Your electronic ignition unit is not rectifying through the gas flame, it is a sensitive piece of equipment and has failed.

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Richmond 5v40-7 gas water heater. Burner lights completely but flame is very low. Does not grow above 1/4 inch.


Is flame clear blue or yellow?
Yellow flame, clean the flame arrestor screen
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html


Flame is blue:
Low gas pressure.
Bad gas control valve.
Dirty combustion parts.
Clean the water heater parts and catch up on maintenance.-
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html#intellivent

Gene

Nov 01, 2014 | Water Heaters

1 Answer

Flame burning too orange


You must get more air to water heater, and check venting .... immediate CO poison danger.
Call qualified plumber immediately.... because deadly carbon monoxide is not being vented properly.
http://waterheatertimer.org/Water-heater-safety-precautions.html#soot

Gene h

Mar 27, 2014 | Water Heaters

1 Answer

Hot water tank doesn't stay on


Suspect the thermocouple that senses that the pilot is lit. This device prevents the gas burner from coming on when if the pilot goes out, but if it's defective could cause the burner to shut down even when there is a pilot flame. Also check the position of the thermocouple in relation to the pilot flame. The tip of the thermocouple should be right in the middle pilot flame.

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Only have hot water when heat is on


A stuck divert-er valve yes replace head, and know this will not cause leaks leaks,leaks are caused by o seals worn and getting old ..and olives on connections replace the above as needed some times a quick tighten with rench will do it leaks that is

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Thermostat is set @120 then drops to 65 and starts flashing. Water get cold. What is the reason . Thanks


Rheem Paloma tankless computer? No error code? One possible cause; Crossover caused by bad single handle faucet cartridge drawing cold water into line causing shut down of tankless burner?
Copy following links for resources:
http://waterheatertimer.org/Crossover.html
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
Add a comment as needed.
Gene
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1 Answer

Would high winds and rain cause pilot light on a rannai tankless water heater to go out?


Yes.
High winds can cause reversal of air flow down vent pipe causing pilot flame to blow out.
If situation happens frequently, then special roof cap has to be added.
Have plumber check natural draft up vent pipe.
Other things can cause same problem, for example if vent fan is located in same room as water heater, or house is tightly insulated, and vent fan is ON, then it will draw air down the water heater vent and blow out pilot.
http://waterheatertimer.org/pdf/Bosch_Checking_the_draft.pdf

Oct 29, 2012 | Water Heaters

1 Answer

How to repair code 13 for tankless water heater


10-15-2012

Code 13 is probably Rheem, Richmond, Ruud, Paloma etc tankless.
Copy following link for troubleshoot resources:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Error 13 is oxygen depletion sensor
Imperfect combustion.
For example if tankless does not have required maintenance, then burner can get dirty and clogged.
This will cause unburned natural gas to rise inside hot flue pipe causing risk of explosion and fire, or in case of propane gas that is heavier than air, the gas will build up inside combustion chamber and cause explosion and fire.

Oct 15, 2012 | Water Heaters

1 Answer

The pilot and flame dont stay on


Look at label on side of product for Brand, model and type water heater.
Add a comment with that specific information.
Many of the questions I see are shortened to a few words.

If you have Reliance gas water heater with FV system, then clean air intake located on bottom of water heater using feather duster, or compressed air.
Other causes could be FV event that tripped TCO, and/or shorted out gas control valve.
Or you could have bad gas control valve.
Or dirty combustion parts.
Or all the above.

Inspect and clean air intake.on reliance:
http://waterheatertimer.org/images/Flame-trap-inspection.jpg
Troubleshoot Pilot
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html#pilot
Replace gas control valve:
http://waterheatertimer.org/pdf/How-to-replace-water-heater-gas-valve.pdf

Oct 07, 2012 | Water Heaters

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