Goodman furnace troubleshooting Q’s
I have a goodman furnace with an inoperative blower. The blower motor hums when given a start command but dosent turn over which leads me to believe that i need to replace the capacitor?
There is no burning smell sugesting burned up windings and Im getting 120V and 24V power where it needs to be. Also the outdoor Condenser is running so I dont think that the control board is fried but….
Whats confusing me is that the control board is showing a control failure code…(no lights). Or is this normal when the fan is running under cooling?
My plan is to “kick start” the motor by manually spinning the squirl cage (with something other than my fingers!) If I can get the thing past the inrush of starting current and get it spinning, then in then I can leave the fan running untill I can pick up a new capacitor.
Anyone care to shoot holes in my theory before I loose my hand?
Also, anyone know is the blower fan runs a certian speed under cooling? (as opposed to multiple speeds under heating)
Replies
Can't help w/ the capacitor.
Blower speed on cooling should be at the high range if not the highest. Takes more air velocity to cool properly than to heat.
Update:
Its definitley the control board...I hot wired the blower and it runs fine...new board is on order.
A while back so I'm a little foggy on it but there is a automotive style fuse on the board that could be blown.
Fan was running and they had tapped in a refer in the garage and it over loaded when they added Christmas lights and blew the cirucit. When a restart went it blew the little fuse.