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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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I have a Carrier 58GSC furnace. At the blower cycles on and

Customer Question

I have a Carrier 58GSC furnace. At the blower cycles on and off a few times at the end of heating cycle. I already replaced the limit switch but it didn't help. The filter is clean.
JA: Did you double-check the thermostat's settings? And what about the filters?
Customer: thermostat is fine. We never changed the setting. Filter is clean.
JA: Do you plan on doing the work yourself?
Customer: yes
JA: Anything else we should know to help you best?
Customer: no
Submitted: 8 months ago.
Category: HVAC
Expert:  gotoman for ac replied 8 months ago.

Russ here. You have replaced limit that will cause this problem. The only thing left is the board. It is a time delay for fan. To double check and to make sure it is board. When heat is on disconnect w from from the furnace to shut down heat. If the fan does the same thing it is board. Russ