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Question:

After puting in a new fan motor in the condenser unit on my ac.. The motor is seizing up.?

I was told the bearings in the old motor were bad thats why it was seizing up in the first place that why it was doing it in the first place but its still doing it.... Please help

Answer:

You don't mention the capacitor which should be replaced, also. Inspect the fan blades, like the answer says above, to see if they're hitting the sides, out of balance, which will stress the motor shaft. Look at the wiring connections for any frayed insulation, bad terminals. You will get a high amp reading if you have them due to increased resistance. You might have a low voltage issue at the contactor. You can get bad motor out of the box, so check the play up and down of the shaft and free rotation of it before you pay for the next one.
Yes it could be a bad motor, even fresh out of the carton.... BUT also check your wiring-connected properly, is fan spinning freely by hand when power is off, are all wires and connections tight and intact, and how is the capacitor. Is there a seperate capacitor for the fan? Also, saw this once-are any of the fan blades hitting the inside of the consenser coils. Loook for gouges on INSIDE of the condenser coils. Good Luck

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