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I wired up my replacement fasco motor for my condenser fan and it ran for maybe 30 mins and shut down. It was very hot and wouldn't come back on until it cooled down. I wired it like the dealer told me, but I wish I had a diagram. Model no.D5458

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Tough to answer without more information. Most likely the speed of the motor is too fast for the fan which causes unnecessary load on the motor causing it to overheat and shut off. Likewise the motor could be underpowered causing the same thing. I would bank on speed. The squirrel cage blowers have speed limits and won't go any faster regardless of how fast the motor can turn. Check the speed rating on the old motor and compair it to the new one.

Posted on Sep 07, 2010

  • did ya no Feb 12, 2011

    Could be your "run" winding capacitor.

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I live in south texas overnight the ac stopped GOODMAN MODEL


Is the condenser fan (outside) turning? You mention that it's hot but don't say if it's turning or not.

These fan motors normally run pretty hot, but not so much that they shut down due to internal thermal overload protectors.

Both the compressor and the fan have termperature overload protectors to keep them from burning out the motor in the event of an overheated condition. The condenser fan must be running or high freon pressure will put an excessive load on the compressor and it will 'kick out' the high-temp overload protector.

Turn off the unit by pulling the outside disconnect (in a small box near the outside compressor unit) or flip the AC breakers in the breaker box. Wait about 30 minutes for the unit to cool off and turn it back on. If the compressor and fan both run for awhile then kick back off, or the fan motor seems to be working under excessive strain, you've probably got a bad motor start condenser (inside the unit) that little round can that is connected through the fan motor wiring. If it's swollen or leaking, it's almost surely defective and even if it's not, excessive load on the motor is a classic sign of a bad start condenser.

You can usually find these at electrical supply stores, well-stocked hardware stores, or most certainly at an HVAC parts house. Be sure to replace the old one with one of the EXACT same value (in voltage and Microfarads (mF) capacity. The shape may be a little different, but as long as the electrical characteristics are the same and is rated at the same or higher voltage than the original, it will work.

Connect the new condenser, mount it to the frame, and restart the unit. This should take care of the problem.

Hope this helps.

Jun 28, 2009 | Heating & Cooling

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