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Gas hot water tank, pilot light

The pilot light on my gas hot water heater always goes out over night. I re-light it in the morning and it stays on all day and evening whether i use water or not. I have replace thermocouplers a few times and it continues to do the same thing... i have no problem lighting the pilot, but something causes it to go out between evening and morning. what the?

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  • ssiimmss Dec 16, 2008

    additional info...

    approx 15 yrs old

    in basement of house

    natural gas

    John Wood brand

  • dmhervey Jan 04, 2009

    My hot water tank is only 3 1/2 years old. The pilot keeps going out. It will light every time I go to light it, but it goes right back out. There are no drafts in the area. What could be the problem?

  • Joe Neff May 11, 2010

    How old is the water heater and what brand and model #. Where is it located? Basement? Closet? In a House or Trailer?

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Look inside the water heater when it is heating the water, the flame should be blue. If it has yellow tips on the flame, it needs an adjustment to the air shutter. There is a nut on this air shutter to make this adjustment. This adjusts the air gas mixture. You may first try just simply tapping on the burner lightly to loosen any debris that may have built up and vacuum it out. MAKE SURE YOU TURN OFF THE GAS BEFORE CLEANING THE BURNER!! Also, check for drafts that may be blowing out your pilot light, Furnace register or outside drafts on windy nights. Some water heaters have an automatic shut down if the water heater gets too hot, so don't have it set to its hottest setting. Most water heaters only last about 10 years or so, It could be you are ready for a new one....Joe

Posted on Dec 16, 2008

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Do you have Natural Gas or do you use Propane?

There should be a shut off valve within 6ft of the gas valve on the heater, turn this off. Also, you should turn your gas valve to the off position on the heater itself.

Then, remove the burner assembly and make sure that there is nothing clogging any of the feed tubes.

Put everything back together and see if it operates properly.


If your Heater is hooked to "Public Utility" natural gas, you may have to have the gas company check the pressure within your home.
When everyone gets up in the morning to go to work, they all jump in the shower at about the same time. On rare occasions, if the pressure to you house is not regulated correctly, this can cause a pressure drop and the pilot will go out.

Water Heaters are one of the last appliances to have a standing pilot. Most boilers, stoves and other gas appliances sold today have electronic "spark" ignitions that will light the burner element on demand.

Posted on Dec 16, 2008

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Junkers manual gas hot water


What are you expecting to happen?

I assume the water heater and water inside it is cold (otherwise you would not be lighting it). You light the pilot. The main burner comes on and the pilot lights it. The main burner should stay on until the tank is hot, When the tank gets hot the main burner should shut off but the pilot stay on. If you draw hot water, cold water will run in and cool the tank. If yu do nothing the tank will eventually just cools off. then the main burner should come back on to reheat the tank.

Nov 05, 2013 | Water Heaters

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Does the pilot light always stay lit on this water


Many water heaters today are pilotless.
Call manufacturer with model and serial number

Gene.

Sep 04, 2013 | RTO W4 A.O Smith Gas Hot Water Heater...

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WATER HEATER GOES OUT OVER NIGHT


you either have a back draft blowing out the pilot light, or a bad thermal coupling. if coupling is bad it will shut down the gas flow therefore shutting off pilot light. its a safety measure to stop the gas flow if pilot goes out. replace thermal coupling, that may do it. good-day ! but shut off gas first !

Mar 21, 2012 | Water Heaters

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The pilot won't stay lit on gas hot water tank.


Make sure thermocouple tip is seated inside the burner flame.
Make sure thermocouple is not overtightened. Finger-tight + 1/4 turn.
If the pilot lights, then ECO energy cut off is not tripped, but gas control valve might be bad.
Check color of pilot flame: it should be strong and clear blue.
If pilot flame is weak, or color of flame is yellow-orange: Clean pilot orifice and burner and combustion parts on yearly basis.
Clean air intake screen if applicable.
Increase air supply to water heater. Open a window and see what happens.
Check for adequate draft going up chimney using match under vent hood to see if smoke drafts immediately upwards.
Bleed air out of gas line.
Check gas pressure.

Open following links for troubleshoot resources:
http://waterheatertimer.org/pdf/Pilot-light-will-not-stay-lit.pdf
http://waterheatertimer.org/pdf/Pilot-outage-troubleshooting.pdf
http://waterheatertimer.org/pdf/Vent-spillage-test-atmospheric-gas-water-heater.pdf
http://waterheatertimer.org/How-to-install-gas-water-heater.html#troubleshoot

Sep 21, 2011 | Water Heaters

1 Answer

Reliance 606 natural gas water heater - model #640YORT - water does not stay hot. pilot has to be clicked to heat and then u can use hot water til tank empty and it will not continue to heat water.


If I understand correctly, the pilot light is not staying lit.
You light the pilot and water in the tank reaches temperature.
Once hot water is gone, then pilot light has to be lit again.

Gas pressure is good, and gas is flowing.
Thermostat is working at high end because it cuts off heating.
Vent is working because tank heats up.
Air intake is working.

Gas control thermostat might not be reading low temperature. Replace gas control valve.
Pilot tube might be dirty. Clean burner parts and combustion chamber, and air intake, and vent.
Backdraft might be blowing out pilot. Check for constant updraft by running water heater 5 minutes, and then light match under vent hood and see if smoke goes up.
Very hot air can put out pilot, especially when water heater located in attic. Add ventilation.
Improper vent might have water dripping back down into combustion chamber and putting out pilot light and rusting out the parts. Inspect for rusted parts and water.
http://waterheatertimer.org/How-to-install-gas-water-heater.html#troubleshoot
http://waterheatertimer.org/pdf/Pilot-light-will-not-stay-lit.pdf

Aug 09, 2011 | Reliance Natural Gas Water Heater Control

3 Answers

I have a Rheem PG50T9A gas hot water heater. We had hot water this morning. When I came home the pilot light was out and won't stay lit. Any ideas?


Hopefully just the thermocouple. The thermocouple is the small rod right next to the pilot light. The flame on the pilot heats up the thermocouple and keeps the gas valve on. You can replace it yourself. The thermocouple will be connect by a small nut on the underneath side of the valve, and you will have to pull the thermocouple out of the pilot assembly. Not an expensive part, you can get it at any hardware store. Hope this helps you .

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After a few minutes of burner heating the water, gas shuts off.


A couple of things to check:

If possible, remove the pilot gas assembly and clean the gas jet and thermocouple - they can get carboned up and stop working properly. Make sure the pilot flame and deflector is aimed properly and making the thermocouple glow red hot. If the problem persists, you may want to replace the thermocouple and also check the propane regulator.

Apr 20, 2009 | RTO Atwood Water Heater - 6 Gal LP

1 Answer

No Hot Water in morning


Remove the cover then the access cover, then you can see inside,
the pilot light is probably out.

If out turn the gas off, then get a long match, grill lighter,or piece of paper ready to light, you should be able to see the little thin
gas line that runs inside the tank and see where it connects to,that is where you need to light, now that you see where to light, turn gas knob to pilot, and press down and at the same time light the pilot.
( blow into the pilot area before putting match inside to make sure no gas has built up inside) Hold down the knob for a minute then release, if pilot goes out try again and hold down longer, if you hold it for 3mins and it does not stay lite, the thermocouple is bad and you will have to replace it.

Apr 14, 2009 | Rheem 40 Gallon FVR NATGAS Low WATER...

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