Replacing Old Blower Motor Help

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Old 04-10-11, 05:10 AM
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Replacing Old Blower Motor Help

I have been having trouble with my gas-fired hot air furnace blower motor, and have decided to replace the old motor with a new one.

The old motor, a 1/3 hp GE utility motor had electrical connections for the wires coming from the furnace. The red wire and white wire were in use, the black wire was taped off with electrical tape.

The new motor, made by Fasco, has 7 wires to connect to. According to the wiring diagram on the spec. label on the motor, I understand which wires are to be bundled together to form connections labeled Line 1, Insulate, and Line 2.

My question is, which groups of wires would the red and white wires connect to? My hunch is that the red wire would connect to Line 1, and the white wire to Insulate.

Could anyone let me know if my hunch is correct, and if not, what I should do?

Many thanks!
 
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Old 04-10-11, 12:44 PM
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going to need more info on new motor, such as model number......or post good pic of wiring diagram.... btw, white is common (neutral), red is fan low speed hot
 
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Old 04-10-11, 01:05 PM
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Verify that your voltage and horsepower match the old motor.

Connect the new red (low speed) wire to the spot that the old red wire connected to.
Connect white to the spot that the old white connected to.
Cap off the blue (medium speed) and black (high speed) wires separately.
Green connects to the furnace body, usually the strap holding the capacitor to the blower housing.
The 2 brown wires connect to opposite posts on the new capacitor that you bought with your new motor.

Post the model number of your new motor as hvactechfw stated for verification.
 
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Old 04-10-11, 02:27 PM
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Thanks for the info.

The specs on the new motor match those of the old one.

The model # is 87676025
Fasco part # D-6004

Tried to get a decent pic of the wiring diagram, but my camera dosen't do well with fine close-ups.

The wiring diagram is:

P1 Line 1

T8
P2 Insulate
T3

T4
T2 Line 2
T5

Red and white wires come from the furnace to the blower motor.

Thanks again.
 
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Old 04-10-11, 04:29 PM
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From what I can determine that is a dual voltage motor which, depending upon how it is wired, can be used for either 120 or 230 volts. If you are not absolutely clear on how to wire it, don't even try. If you wire it for the wrong voltage you will fry the motor.
 
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Old 04-10-11, 05:07 PM
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Thanks for the warning! Both wiring diagrams are very clear in stating which one is for 115v and 230v, so I am very clear and safe on that. That's the good part!
 
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Old 04-11-11, 06:46 AM
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Can you scan the wiring diagram & post it on photobucket.com or similar site then provide a link here?
 
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