[aritch]

Hello,

I had to replace the capacitor and fan motor about two weeks ago. Now, when I energize the units, the 3 amp fuse blows in the furnace. Also, there is no 24v going to the defrost control board. The way the DC board is wired, it has only 5 screws (C,R,O,W1,Y1) with 6 wires connected. A blue wire from the defrost knob is connected with a yellow wire on the Y1 connection. Is my unit wired wrong? Common=brown wire; R=red; O= orange; W1 has a green wire on the DC board; Y1 = blue/yellow. Please advise!

Thanks,

Adam

[hvac1000]

If the unit was wired wrong it would not have worked to start with. The low voltage should have nothing to do with the motor change. Is the 3 amp fuse blows that means you usually have a shorted wire or a bad component that uses 24 volts. It could also be a burnt transformer.