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Reliance 640yort4 I have a gas water heater that wont stay lit. We've replaced the thermocouple and it still heats up the tank then goes out. Sometimes it will go out even before its fully heated.

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 68 Answers

SOURCE: my pilot light on the water heater won't stay lit

The thermocouple or gas valve needs to be replaced. Start with the thermocouple.

Good Luck

Posted on Dec 09, 2008

  • 35 Answers

SOURCE: gas hot water tank, pilot light

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

snap101
  • 117 Answers

SOURCE: i have a richmond gas hot water heater model

try sanding the tip of it with sand paper sometimes that helps

Posted on Aug 11, 2009

john224
  • 1378 Answers

SOURCE: Natural gas hot water heater not stying lit

Probably a bad solenoid in the gas valve. Higher voltage of a new thermocouple keeps it open longer but it still fails over a period of time. Look into a new gas valve for the water heater.

Posted on Dec 17, 2009

  • 1 Answer

SOURCE: Pilot won't stay lit in Reliance 606 gas water heater

The Reliance 606 has an enclosed thermal couple. Before you try taking that assembly apart take a wire brush to the bottom opening directly under the burner. There is a metal filter on the very bottom of the water heater. It could be that the filter has gotten filled with dust or animal hair. It took a serviceman 2 days to figure this out for me. The water heater has to have good airflow through that filter to work well.

Posted on Sep 29, 2010

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2 Answers

How do I get the pilot lit, my gas is on, but no heat or hot water or fire on stove


Bad thermocouple. Replace the thermocouple for under $30 for part. Very common with gas water heaters. How old is the Water Heater?
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Apr 09, 2015 | Reliance Water Heaters

1 Answer

Reliant 501 Natural Gas won't stay lit


Reliance water heater?
Thermocouple is good if the pilot stays lit continuously.

501 is older model. Unknown if this unit has FVIR protection and sealed combustion chamber or open air intake on front of unit.
http://waterheatertimer.org/pdf/Reliance-2006-Service-Handbook.pdf

With FVIR protection:
Get more fresh air to the unit.
Clean the flame arrestor screen.
Test and replace the thermocouple:
http://waterheatertimer.org/How-to-test-water-heater-thermocouple.html
Inspect and clean burner and combustion parts
Test gas pressure, bleed air out of gas line.
Replace gas control valve.
Test draft air by lighting match and see if smoke is pulled into the vent pipe at draft hood on top of tank.

Aug 20, 2012 | Water Heaters

1 Answer

Reliance 606 Hot water Heating element (Pilot light) won't stay lit


Gas water heaters don't have elements, so I am confused about what type water heater you have..
Look on the side of tank for the label.
Find the brand, and type. Does it show BTUs? Or does it show wattage?
Then re-post question with this information, for best possible answer.
Also post question on Tank forum.
http://www.thetankatwaterheaterrescue.com/forums/forum3/

Aug 12, 2012 | 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

1 Answer

The pilot will not stay lit after water in tank reaches desired temperature. After tank cools down pilot will relight and heat water again thyen goes out approximately 1-2 minute3s after water has been...


Hi,
Thermocouple is getting weak... the extra heat from the main burner will keep it lit but after it goes out the thermocouple will then shut down..
Replace the thermocouple...

heatman101

Apr 30, 2011 | Rheem 40 Gallon FVR NATGAS Low WATER...

1 Answer

My reliance 606 hot water tank pilot wont stay on soon i release it it goes out and no hot water what do i need to do to solve the prolem myself?


You need to replace the thermocouple. It unscrews from the thermostat on one end, and the other one hooks in a bracket. After replacment make sure the thermocouple bulb is in the pilot flame.

Apr 08, 2010 | Reliance & 40 Gal Electric Mobile Home...

1 Answer

Reliance gas water heater 640ycrs pilot light will not stay after 1 heat period replaced thermal couple has gas thermal switch


if water heater will heat a tank of water before the pilot light goes out you need to replce the gas thermostat

Mar 04, 2010 | Reliance & 30 Gal LP Gas Water Heater

1 Answer

My pilot light on the water heater won't stay lit


The thermocouple or gas valve needs to be replaced. Start with the thermocouple.

Good Luck

Dec 09, 2008 | Water Heaters

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