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Fernace won't light thermocouple is good - Vanguard International Infra Red - Medium Infra-Red Mid-Size Heater

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Carrier fernace light on board not comming on


check high voltage going to board and transformer then check low voltage from transformer to board. If you have voltage on these board is bad. Correct voltage that is.high 110v-120v low 24v-28v

Aug 28, 2012 | Carrier Heating & Cooling

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

Delonghi Superser won't light there is gas getting


Clean pilot first see if it lights if not you could change thermocouple

Apr 03, 2012 | DeLonghi Heating & Cooling

2 Answers

My water heater won't light. The pilot light works. But, when I try to swtch the pilot to regualr, the flame goes out.


You probably have a defective thermocouple. The thermocouple sits in the flame of the pilot, and the heat generates a small electrical current conducted back to the gas valve, keeping the pilot gas line open after you switch it to the "on" position. That's why you have to manually hold the gas valve depressed (on) during lighting in the "pilot" position, allowing the thermocouple time to heat up enough to generate its current. A defective thermocouple will not generate the holding current.

Jan 06, 2012 | Heating & Cooling

2 Answers

Water heater pilot light will not stay lit. changed the thermocouple, and still won't stay lit.


Hold the pilot button down for a full minute after it lights, then release. If this does not work then the thermocouple is not adjusted where the flame is heating it or you just have a faulty new thermocouple.

Sep 06, 2011 | Heating & Cooling

1 Answer

The pilot light on my propane furnace will not stay lit. I replaced the thermocouple, but it won't stay on. Any suggestions?


Hi, with a new thermocouple, the only other thing it can be is the valve. Replace the valve.

Sep 03, 2011 | Heating & Cooling

1 Answer

Pilot will light after 30 seconds when you try to move knob to on position the pilot goes out and heater won't ignite.


You need to replace the thermocouple.
When you light the pilot it is supose to heat the thermocouple.
the thermocouple produces a small electric current which allows the gas valve to open and keep the pilot going. and allowing the main burner to come on.

Jun 21, 2011 | RTO Atwood Water Heater - 6 Gal LP

3 Answers

Pilot light won`t stay burning on my hot water tank. I replaced the thermacoupler;no difference. It is a Rheem Gauardian system ''Fury''. 40 gal in a wellsite skid trailer. Thanks


The thermocouple is a screw in type or 2 wire. You can check the dc MILI volt output with a multimeter. It should probably make 500-750miliVDC when heated. Be sure no plastic from the thermocouple wrapper was on the threads, will not work like that. To light did you push and hold the valve for 30 sec after lighting the pilot then turn to run after the pilot was burning? There is a slight chance the gas valve is bad but not likely. Check the wireing on the thermocouple to the gas valve.

Oct 19, 2009 | Rheem 40 Gallon FVR NATGAS Low WATER...

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