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Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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Need help troubleshooting a furnace/AC issue. Control board,

Customer Question

Need help troubleshooting a furnace/AC issue. Control board, model number HK42FZ011.
Fan relay clicks when shorted on R+G on the 24V side, but the fan does not start.
Submitted: 2 years ago.
Category: HVAC
Expert:  Phil replied 2 years ago.
It is most likely that the contacts in the fan relay are burned off, or that a wire terminal is burned off at the motor, or the motor is bad. If you can attach a well lit, well focused close up photo of the wiring diagram, taken from straight on, glued inside the furnace blower cabinet I can mark it up with coaching instructions. You will need a multi meter to do the tests. If you have a clamp around type amp meter that would be better. We can go from there.