I believe I have troubleshot this down to either the blower motor or their Integrated Controller board. 120VAC to motor OK but too many other wires from board to motor for motor control to test (variable speed) without advice or a manual. Motor is rated for 100% duty cycle and has only been run...

I have a Trane XL90 furnace. The blower motor just hums when I turn it on heat or cool. I pulled the blower motor and housing out of the furnace and it works fine sitting on the basement floor but when I reinstall it into the furnace, it just goes back to humming. Any help would be greatly...

Had an AC salesman out today about replacing the upstairs unit. He was demonstrating "proper air flow" with the basement unit. He opened the furnace and the blower motor made a squealing noise when it came back on. He flicked the power off and then on again and the noise disappeared. He said it...

The motor in one of my 35-year old Trane air handlers recently Blew. It looked quite old. I figured it would be easy to replace It just by matching the specs. Unfortunately the new Motor runs for 10-15 minutes, then it stops for 15 minutes, Then it starts again. I suspect the thermal...

Noticed last night that my Trane furnace was squeaking like a cricket when the air conditioner was running. Then every so often it would make an awful squealing sound like maybe a motor was getting stuck and unable to turn. From reading other posts I'm guessing that I might have a bearing or belt...