Pilot on Gas Furnace will not stay lit

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  #1  
Old 11-21-00, 04:32 PM
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Recently we had a power outage. Since then the pilot light on the furnace will not stay lit to ignition when turning valve to the "on" position.
Have changed Thermocople already and this has not helped.
Could the surge from the return to power have effected any other parts?
 
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Old 11-21-00, 09:11 PM
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Hiaryl

The power outage and the return to power wouldn't effect the condition your discribing.

The pilot won't stay lighted because of a defective pilot solenoid, a defective thermocouple <yes, new ones can be defective too> a weak or yellowed pilot flame or a thermocouple incorrectly positioned in the pilot assembly.

Be sure the new thermocouple is correctly install. The pilot flame should be touching only the top tip of the thermocouple. It should be then glowing red hot.

The thermocouples other end should be snugly screwed into the gas valves body. This is the part that is called the safety system which is the pilot solenoid. It can also be removed and replaced.

Good Luck,
TomBartco
 
  #3  
Old 11-23-00, 08:27 AM
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The thermocouple must have certain conditions to operate:
- needs a good blue pilot . It needs to be cleaned annually. If you have a yellow flame, the pilot needs cleaning.
- Make sure the tip of the thermocouple is in the pilot flame.
- Make sure the connection at the gas valve is not loose, but firm.
- There might be a limit or rollout wired to the thermocouple, if there is there would be two wires connected right below were the the thermocouple is connected.
- It could be a weak gas valve magnet. If the gas valve is the problem, replace the whole valve. DO NOT ATTEMP TO REPAIR A GAS VALVE, REPLACE THE WHOLE THING. GAS VALVE COMPANYS WARN NOT TO REPAIR BECAUSE IF PUT TOGETHER INCORRECTLY THEY HAVE CAUSED HOMES TO BLOW UP.
- Make sure you try another thermocople , New ones could be bad

Good luck
Mr Foster
 
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