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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 General AIr 1137 Humidifer. I had to replace the

Customer Question

I have a General AIr 1137 Humidifer. I had to replace the motor and when I did I noticed the unit was not wired in to the funrace so it only came on with the furnace. I split one wire with the end from the humidistat running to the hum on the control board. I ran the other end (that goes to the relay to the "C" screw on the board. WHen I start up a get a loud buzzing from the humidifer.
JA: Did you double-check the thermostat's settings? And what about the filters?
Customer: The furnace is a Bryant 340MAV
JA: Do you plan on doing the work yourself?
Customer: Already did it.
JA: Anything else we should know to help you best?
Customer: Did you see what Ityped?
Submitted: 9 months ago.
Category: HVAC
Expert:  BillyHvac replied 9 months ago.

there are 2 types of this is 120v solenoid...and one is 24v solenoid. 2006 and prior was 120v and after that I believe went 24v but this info should be on the if 24v there is already a transformer so the unit having 24v and then getting 24v from furn circuit board would create 2 different 24v signals...if 120v you would be conflicting 24v with 120v which is going to damage something.

I need more info on the unit as far as voltage to continue

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