Carrier/Bryant/Payne 3 wire gas pilot assy 1991 furnace
That is a real pain in the arze unit to service but I will try help. The pilot flame heats a warp switch which expands and closes a set of contacts. If the pilot flame is too small or the orifice gets dirty it won't generate enough heat. The gas valve pilot regulator may need adjusting or it is failing. Have not seen one in yrs so the other guys can correct me if I am wrong. Post the complete model # and I can probably dig up a service manual for it online.
Is it a high efficiency furnace?
"Cut it twice and it is still too short".
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Last edited by yuri; 09-24-2010 at 05:36 PM.