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Port motor One of my motors will not work. It is free spinning without power and "locked" with power. Can it be repaired?

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Best bet is to replace the motor. Sounds like your having wiring issues inside the motor windings.

Posted on Oct 12, 2013

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SOURCE: Port A does not seem to power the motor - the

Hi have just posted this to another same problem post......it worked for me

http://www.robotic-lab.com/en/2009/08/05/small-correction-for-the-nxt-2-0-user-guide/

Posted on Dec 26, 2009

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Inside unit working but no cold air. It's room temp. air. Outside unit is humming very lightly but not spinning. I had this same problem last year but a relay was burned out..


Stop. Do not run the A/C without the fan. The compressor could fail. The answer is exterior fan motor lubrication. With power off, the motor may be checked. Look for oil "ports" on an unsealed electric motor. Open & fill w/ ELECTRIC motor oil. The fan may be manually spun to free it up. The other "relay" problem is usually the contactor, and this would fail "on" always or "off" always. If the contactor is stuck "on" the system will freeze up, if "off" it will not run. You still may need to have coolant added to the system, but it's worth it to check this out first. If the motor has no oil ports, you can still try to free it up, but it will need to be replaced, or it will eventually fail.

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If it does not work at all check the fuse first (check fuse and relay in any case).

If fuse is ok, test the wirings, from switch to fuse box, and from fuse box to motor.

If there is no power from switch to fusebox, replace switch.

If there is no power from switch to motor, check wirings and fuse, and eventually replace them.

If there is power to motor, check that the glass is not stuck , byu removing door panel, if the motor is not working replace it.

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