Troubleshooting Air Compressors

Before you start to work on the motor, MAKE SURE THE POWER IS OFF. Always turn the power off at the electrical service entrance breaker box or fuse, to prevent electrical shock.


FAILURE TO START

1. Check for blown line fuse or tripped breaker. 2. Allow motor to cool and try to reset. 3. One of the most common problems in a woodworking shop is a build-up of sawdust in the motor, especially with open drip proof motors. Give the motor a shot of air to blow out the sawdust, nine times out of ten this will get the motor to start again, to fix the problem the motor should be replaced with a totally enclosed, fan cooled model. MOTOR


MAKES A HUMMING NOISE

When there is air pressure in the tank 1. Drain the air pressure from the tank and try to start it again - If it starts, the airline check valve is probably bad and needs to be replaced.

When there is no air pressure in the tank 1. Refer to the trouble shooting motors page.


AIR COMPRESSOR RUNS CONTINUOUSLY AND WILL NOT CUT OFF

Continues to build up air pressure until safety valve blows air 1.Check to see if the contacts in the pressure switch are disconnecting - If not the pressure switch needs to be replaced.

Continues to run but does not build up air pressure 1. Check belts to make sure they are tight 2. Compressor may be bad or need repair.


UNLOADER VALVE CONTINUES TO BLOW AIR NONSTOP AFTER COMPRESSOR HAS CUT OFF

1.Check Valve is bad allowing air from the tank to release through the unloader valve. If you are still having problems, It should be looked at by a qualified technician Give us a call (804) 355-5713