furnace

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  #1  
Old 01-29-03, 07:20 PM
jpbrevin
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Question furnace

My furnace has, as of late, been shuting off because of the pilot. I have manually lit the pilot to restart. What can I do resolve this?
 
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  #2  
Old 01-30-03, 08:39 AM
bigjohn
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It sounds like you mean a standing pilot? #1 problem with those systems is the thremocouple wears out and doesn't produce sufficient voltage to keep the safety relay in the gas valve pulled in. #2 problem is the pilot burner air slots and/or the gas orifice in the pilot burner are dirty/corroded which results in an insufficianet pilot flame and has the same effect as #1. You can try replacing just the thermocouple [cheap] and see if that restores operation. I usually replace both the thermocouple and the pilot burner assembly because I have to warranty my work.
 
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Old 01-31-03, 05:37 PM
hvac4u's Avatar
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also look

to see if 2 wires attach to the base of the thermocouple, if so it could be a safety opening up. i am with bigjohn, change the tcouple first.
 
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