Question about Rinnai Desa Vent-Free Infrared Gas Heater: Vent-Free Infrared Gas Heater(18,000 BTU)

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My 2520 water heater won't stay lit for just the shower all other

Water sources work fine the flame goes out when we turn on the hot water for the shower

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Replace thermocouple

Posted on Dec 31, 2008

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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

My water heater pilot light won't stay lit


you need to clean the filters in the bottom of the water heater and have the thermal couple also check and see if there is a gas leak by spraying all visible gas lines if this doesent work then you more then likely need a new watter heater

Jan 17, 2012 | Water Heaters

1 Answer

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

Rheem 22V50F1 pilot won't stay lit. Changed thermo couple & it lit, ran then went out. Let it sit overnight & it lit, ran then went out. What next? p.s. The unit is 5 years old. Thanks


If pilot lights and flame is robust and clear blue, and pilot goes out later, then some suspects can be excluded: air in gas line, low gas pressure, thermocouple is overtightened (finger-tight + 1/4 turn), thermocouple not positioned correctly in the flame, dirty pilot tube.
If flame is yellowish and small: then clean pilot tube and combustion parts.
http://waterheatertimer.org/How-to-install-gas-water-heater.html#clean
Remaining suspects can include: air in gas line, low gas pressure, bad gas control valve, tight house so household vent fans pull air down water heater vent that blows out pilot, hot attic with inadequate ventilation, water dripping down vent.

Open following links to read troubleshoot resources.
http://waterheatertimer.org/pdf/Pilot-light-will-not-stay-lit.pdf
http://waterheatertimer.org/How-to-install-gas-water-heater.html#troubleshoot

Aug 16, 2011 | Rheem 50 Gallon FVR NATGAS Water Heater...

2 Answers

Pilot light will not stay lit.


More than likely the thermal couple is defective. The thermal couple is a safety device that shuts the gas off if the pilot goes out. If it is defective the pilot light will not stay lit. The thermal couple is the device that the small copper line goes to. It is mounted beside the pilot flame and the flame much touch the TC for it to work. If the flame is not touching the TC bend it until it is in the flame. If it is touching the TC then replace it.

Jul 28, 2011 | Whirlpool Water Heaters

1 Answer

Do I need to replace the thermocoupling on my Reliance 501 gas water heater? Model is 5 30 NOMT7 C. Recently, I've noticed an intermittent problem with the the hot water not staying consistent. So we're...


The thermocouple is a safety for the gas valve. It tells it the pilot light is lit. If your pilot light is not going out and the burner fires when you turn up the thermostat, it is all working as it should. In other words, if you don't need to re-light the pilot, your thermocouple is OK. Turning up the temperature of the water is a good idea, just be careful not to burn anyone with the hotter water. You mite want to try a water saver shower head. Some don't throw enough water to get the soap off, but I bought one that can be turned to adjust flow and we have been happy with it. If I missed what you need from this, please let me know. Roger

Apr 10, 2011 | Heating & Cooling

1 Answer

We change the burner for the water heater, it stay li ari=ound 35 minutes, heat the water and after is turning on completely, even the small flame don't stay lit. What we need to do?


you mean it is only staying on for 35 minutes, if this is the case, then readjust or replace thermal coupling, if bad it will not sense the flame or pilot light. it has to be in pilot light flame as to work properly. ( this is for a gas hot water heater). if bad it will shut gas off to heater.

Aug 05, 2010 | Water Heaters

1 Answer

Pilot lites; but, as soon as I turn on gas flame


sounds like your thermacouplar is going out and needs replaced. Sometimes these will act like they are working fine , but when the pilot stays on for awhile and later goes out it is a sure sign that it is bad

Nov 08, 2009 | Procom ML300TBA Heater

2 Answers

Pilot wont stay lit


Check the thermocouple,Its is a flame senser.It will not stay lit if it is bad.

Oct 04, 2009 | Water Heaters

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