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View Full Version : How to wire heater blower motor


davidmorrow@ charter.net
Dec 13, 2009, 09:12 AM
I am rewiring a Rudd Heater Blower motor. 240v 3 speed motor and I am trying to wire it. It doesn't matter how I wire it, as soon as I hit the 240v breaker by the unit the motor runs. I have even disconnected the thermostat totally and the motor runs constant. I am not an electrician.(Obviously) Just a poor slob trying to save $300.00 during christmas.
Wiring coming from unit as follows:
Black - High
Red - Low
Orange - power?

On the Blower motor (Marathon Electric X1001)
labeled as follows:
White - common (L1)
Black - high (L2)
Blue - medium ( not used)
Red - Low

The motor that came off was a different brand and no wiring diagram and colors were slightly different.
Can somebody point me in the right direction? I am very confused at this point. The old motor non functional. Thanks

hvac1000
Dec 13, 2009, 09:22 AM
This might help but I think you have a 120 volt motor instead of a 240 volt motor. The white wire is a common on 120 volt motors only. Now if you can pick up a ground for that 120 volt motor you might be able to get it to work BUT you really would be better off with the correct motor.

hvac1000
Dec 13, 2009, 09:29 AM
If the Marathon motor is the one you are trying to install it is probably a 120 volt motor you really need a 240 volt motor. Note you should also have brown and brown with a white tracer for the motor run capacitor. Can you post pictures of what you have now and what was there?