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gotoman for ac
gotoman for ac, HVAC Technician
Category: HVAC
Satisfied Customers: 5161
Experience:  51 years of experience install design and repair of all makes and models of AC
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B3Bm-042k-B air handler. Unit fails to shut off fan when not

Customer Question

B3Bm-042k-B air handler. Unit fails to shut off fan when not heating in 'auto' mode. I have a heat pump. I am hoping there is a continuous-fan circuit on the board that I can disconnect a wire from - not sure though. Have not opened unit to see board and do not have a wiring diagram.

Submitted: 5 years ago.
Category: HVAC
Expert:  airheatman replied 5 years ago.

airheatman :

Let me see if I can find a schematic

airheatman :

Sorry I dont have the manual for that unit

Expert:  gotoman for ac replied 5 years ago.
You have Nordyne product. Go for schematic. Sounds like a contactor or fan relay. Russ
Customer: replied 5 years ago.

Hi Russ,


Contactor or Fan relay - is either atttached to the main board? If so do I need to replace the board or can these parts be fixed without replacing the main board?


How big a job is replacing either one?


Thank you!