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Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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Room air fan will not shut off, since i cleaned stove, yes,

Customer Question

room air fan will not shut off
JA: I'll do all I can to help. How long have you been dealing with this?
Customer: since i cleaned stove
JA: Do you plan on doing the work yourself?
Customer: yes
JA: Anything else we should know to help you best?
Customer: i hooked the wires in the wrong place when i put air motor back on and blue a fuse
Submitted: 10 months ago.
Category: HVAC
Expert:  airheatman replied 10 months ago.

What is model on the unit?I will see if I have a wiring diagram

Customer: replied 10 months ago.
its a st croix
prescoott exp
Customer: replied 10 months ago.
are you still there
Expert:  airheatman replied 10 months ago.

Looking for a diagram

Customer: replied 10 months ago.
k
Expert:  airheatman replied 10 months ago.

Do you have a white wire from fan to terminal block and the black connecting to a pink from molex plug on board?

Customer: replied 10 months ago.
they are both black
Expert:  airheatman replied 10 months ago.

Where are they currently connected?

Customer: replied 10 months ago.
one to the pink and one to the block
Expert:  airheatman replied 10 months ago.

THat should be wired properly

Make sure the orange wires are plugged onto the limit switch, An open limit can make room fan run

Customer: replied 10 months ago.
ther are three places on the motor i think one is a ground thats where i was when i blew the fuse i took that wire and went to the other term and it works but will not shut off comes on the min you plug it in
Customer: replied 10 months ago.
i will see if switch is open
Expert:  airheatman replied 10 months ago.

I do not have a listing on motor to see the 3rd connection.Is there a part number visible on motor?

Customer: replied 10 months ago.
it is open
Customer: replied 10 months ago.
i would have to take it off but i have book
Customer: replied 10 months ago.
i jumpered the wires but still running and stove is cold
Expert:  airheatman replied 10 months ago.

All was working before you cleaned?

Customer: replied 10 months ago.
it will work now but fan stays on and on high all the time
Expert:  airheatman replied 10 months ago.

Sounds like for some reason relay on board is stuck in closed position telling fan to stay on.If you gently tap board will it go off?

Customer: replied 10 months ago.
i hit the reset on switch and it closed put wires on but still running
Customer: replied 10 months ago.
i will tap
Customer: replied 10 months ago.
still running
Expert:  airheatman replied 10 months ago.

Not sure what else to check I will open to other experts to see if they have further ideas.Sounds like board may be bad, but no reason for it to go out just by cleaning unit unless it got damp.

Customer: replied 10 months ago.
no just used vac
Expert:  airheatman replied 10 months ago.

I am going to open to see if any of my colleagues have suggestions.

Customer: replied 10 months ago.
wheres best place to get a board or a used one those are costly