IF THE COMPRESSOR IS 208/ 230/ 240 VOLTS CHECK THE VOLTAGE FROM HOT TO GROUND AND MAKE SURE YOU HAVE BOTH LEGS COMMING IN ARE HOT. IF SINGLE PHASE 120 YOU MIGHT WANT TO CHECK THE CAPACITOR IF IT IS CAPCITOR START
SOURCE: Sears Craftsman 3-Gallon, 1.5 HP Air Compressor Hums
YES IT MAY BE THE CAPACITOR . IT COULD ALSO BE THE WIREING IN THE MTR, THE PUNP ITSELF.
SOURCE: I have a 3 gallon Craftsman air compressor that
The problem is probably a faulty motor run capacitor.
You will find it under the cover where the cable goes into the motor. Stephen.
SOURCE: 6hp craftsman air compressor runs to 3 or 4
make sure it is plugged into a 20amp outlet. and do not use an extention cord
SOURCE: My Craftsman air compressor is locked up. When
1. While the compressor is unplugged, see if you can turn the motor freely with a screwdriver or something to determine that the motor is not jammed 2. If there is a removable cover, check to see if the brushes are worn, (replace if needed). 3. There is also a relay that tells the motor to start located near the pressure adjustment. If this relay is defective or the contacts are burnt, you may need to replace the relay. Good Luck!
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