Forum Discussion
Golden_HVAC
Apr 30, 2013Explorer
My guess is that you might find it is reaching over 150F air output, and locking out. Did you have a chance to check the temp of the air yet?
Higher than normal air temps can be caused by a bocked vent, or near the furnace if the hot air is leaking into the cabinet that the furnace is located in, then the air returning to the furnace might be say 95F on average rather than a normal 60 - 70F. I had to seal one of my supply air ducts that was leaking hot air near the furnace, and also installed some reflex insulation around the hot air chamber, to prevent so much heat from gettting back into the return air and fan intake.
Cooler air into the furnace supply air fan means cooler output air, and thus will run longer without going into lockout. Also if the furnace has only 3 ducts, say 4" ductwork each, that might be barely enough air flow, 4 or 5 ducts might flow a lot more air, and the output air will be in the normal 120 - 140F range, the thing will stop locking out.
Good luck,
Fred.
Higher than normal air temps can be caused by a bocked vent, or near the furnace if the hot air is leaking into the cabinet that the furnace is located in, then the air returning to the furnace might be say 95F on average rather than a normal 60 - 70F. I had to seal one of my supply air ducts that was leaking hot air near the furnace, and also installed some reflex insulation around the hot air chamber, to prevent so much heat from gettting back into the return air and fan intake.
Cooler air into the furnace supply air fan means cooler output air, and thus will run longer without going into lockout. Also if the furnace has only 3 ducts, say 4" ductwork each, that might be barely enough air flow, 4 or 5 ducts might flow a lot more air, and the output air will be in the normal 120 - 140F range, the thing will stop locking out.
Good luck,
Fred.
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