HVAC Questions? Ask an HVAC Expert for Answers ASAP
Remove the thermostat cover. You should see a R terminal W terminal Y terminal W terminal
Remove the wires from the R and W terminal and twist them together.
Go to the furnace and observe the ignition start up process. The inducer fan motor should come on first.
Let me know if it comes on or not.
Thanks, XXXXX XXXXX Rh and W were not previously tied together, why would this happen?
They should not be tied together.
This is a troubleshooting method to bypass the thermostat.
oh, okay, I will turn off breaker, then try this, BRB
I did observe the furnace "click on" to deliver heat, but I noticed a low hum sound.
It sounds like you inducer fan motor is not coming on.
Use a voltmeter to see if the inducer fan motor is receiving 120 volts.
what do i do then?
how do we detemine if that is the issue?
If it is, and the inducer fan motor is not coming on, then the motor is bad.
hmm that sucks. is there another troubleshooting step we can do to focus on the issue before we resolve that is it?
That is it.
Then inducer fan motor must come on first.
If it does not come on, then nothing is going to work.
what does a replacement usually run? is it a DIY thing?
Yes it is a do it yourself thing. They usually run about $150
just go to Home Depot?
how do I know the model, etc.?
But first you have to use the voltmeter to see if it is receiving 120 volts. If it is, then the motor is bad. If it is not, then the control board is bad. You cannot get one from Home Depot.
You will have to get the model number and serial number of the furnace.
You are welcome
so find someone with a voltmeter, check to see
if what is receiveing 120v? what do we hook it up to?
Please hit ACCEPT if you are satisfied with this service. Thanks!
well hang on, please
There are two wires hooked to the inducer fan motor.
A black and white wires
Remove the wires from the inducer fan motor and hook the meter leads to these two wires
ok, so if that is NOT getting 120v we need a new board, if it is, then a new motor?
That is correct.
okay, thanks, XXXXX XXXXX give it a go.
I do not see any white and black wires on the furnace unit. I have attached an image to show you what the unit looks like. Any further assistance is appreciated.
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HI, thank you!
No, the LED light is solid green in the box just below it.
When I turn on the fan, there is air blowing through the floor vents. I would like to check the inducer, but I cannot find it! Ha! I will check the manual for the inducer and "limits"
The manual will help you...the plastic pipes carry the exhaust fan air..so they will lead to it.
also look at component placement in manual.