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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 Williamson gas fired furnace.... some times the

Customer Question

I have a Williamson gas fired furnace.... some times the furnace will cycle for days then it will go through a cycle the blowers
Will continue to run trips the circuit board a red flashing light comes on and I have
to shut furnace off and turn back on and it will start running again
Submitted: 1 year ago.
Category: HVAC
Expert:  gotoman for ac replied 1 year ago.

When am continues to run it is usually a limit switch. Shutting off the furnace resets the faults. Things that will cause this problem is dirty filters,stopped up AC coil,bad limit switch, high gas pressure and fan not running. Start by changing filters first. Russ

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