This morning my husband turned on the heater and noticed that it was not working. We have a Carrier Weathermaker SX and my husband noticed that when he turns on the heater it makes a humming noise. He open things up and noticed that the small fan for the Inducer Motor was not working. My husband has an electronics back ground and is a good do-it-yourselfer he could use a little advice. Do we need to have the inducer motor replaced? If so, is this something we can do to save on cost? Thanks
Sometimes when these motors sit idle for a few months without moving they devolope a dead spot and they wont run when you first turn on your heat, just give it a quick spin on the call for heat and it should work fine. If it stops again more than likely you will have to have the motor replaced.
Most likely the motor is developing a problem. As previously mentioned, yes it could have a 'dead spot' from sitting, but if it we me, I'd be proactive and replace it now. Rather do it now then when it's 20 degrees out and in the middle of the night.
One test you can do is verify that 120V is being sent to it. Shut the machine off...should have a switch mounted near the furnace. Unplug the electrical connector to the motor, set your meter to 120VAC accordingly. Turn the t-stat way up, then turn the machine back on. The inducer circuit should read ~120V within a second or two.
Just because you can, doesn't always mean you should