Question about Campbell Hausfeld 26 - Gallon Air Compressor

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Compressor will not start

Motor buzzes as if it is bound up then trips my 20 amp breaker. Motor appears to turn freely by hand. Compressor starts and turns 1 to 2 revolutions then stops and starts buzzing. This happens with and without air in tank. Please help!

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It is a good sign that the motor turns freely with and without air. That indicates that you have good bearings and that the intank check valve is in good condition. Next you should check the capacitors and the condition of the windings. Some motors have start and run capacitors and others only have run cap. Remove from the circuit and test with meter having cap. test setting. Most shops will test them for free. The cap should test within 95% of stated ( uf ) value. Replace as needed. Finally check that the flyball switch at rear inside of motor is functioning correctly. At rest, switch is at start winding, then a split second after start, it shifts to run winding. Check contacts are not stuck and that switch is working and lastly that the winding are the color of new penny. Good luck.

Posted on Jan 06, 2009

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