| TROUBLESHOOTING GUIDE | |
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Problem Encountered | Possible Cause | Possible Solution |
The compressor does not | Power cord not plugged in. | Plug cord into grounded outlet. |
start or restart: | Motor/Pressure switch in | Move switch to AUTO position. |
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OFF position
Motor thermal overload switch has tripped.
Turn air compressor off, wait until the motor is cool, then press motor thermal overload (red) button firmly until click is heard.
| Fuse blown or circuit breaker has | Replace fuse or reset circuit breaker. |
| tripped. | Check for proper fuse amperage. |
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| Check for low voltage conditions. |
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| Disconnect any other electrical appliances from circuit or |
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| operate air compressor on its own branch circuit. |
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| Wrong gauge wire or length of | Check chart in instruction manual for proper gauge wire |
| extension cord. | and cord length. |
| Air tank pressure exceeds motor/pressure | Motor will start automatically when air tank pressure drops |
| switch | below |
| Pressure release valve on | Bleed the line by moving the switch to the OFF position. |
| motor/pressure switch has not |
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| unloaded pump head pressure. |
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| Defective motor, motor capacitor, | Contact Consumer Helpline at |
| motor/pressure switch. |
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The compressor motor stalls: | Overloaded motor. | Have a certified electrician check the motor and wiring. |
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| Proceed with his or her recommendations. |
| Improper lubrication. | See LUBRICATION section in instruction manual. |
| Low oil level. | Check oil level and fill if necessary. |
| Defective check valve. | Replace check valve. |
Excessively noisy operation: | Loose motor pulley or pump flywheel. | Tighten pulley and/or flywheel (where applicable). |
| Lack of oil in the pump crankcase. | Check oil level. If low, check for possible bearing damage. |
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| Add correct amount of oil. |
Carbon deposits on pistons or valves.
Remove cylinder head and inspect. Clean or replace parts as needed.
| Bearing, piston or connecting rod | STOP THE COMPRESSOR! Contact Consumer Helpline at |
| failure. | |
| Worn connecting rod. | Replace with new connecting rod. |
| Worn piston wrist pin bushing. | Remove piston/connecting rod assembly from the compressor |
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| and inspect for excess wear. Replace worn parts as needed. |
| Worn bearings. | Replace worn bearings as needed. |
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| NOTE: Dirty oil can cause accelerated wear. |
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| Change oil frequently using recommended oil. |
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| Noisy check valve. | Replace check valve. |
When in the Start/Stop | Motor/Pressure switch does not shut | Move the motor/pressure switch to the OFF position. If the |
option, motor runs | off motor when air compressor | motor does not shut off, unplug the air compressor. If the |
continuously: | reaches | electrical contacts are welded together, replace the pressure |
| relief valve activates. | switch. |
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| Air compressor is incorrectly sized. | Limit the air pressure to the capacity of the air compressor. |
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| Either use a smaller tool or a larger air compressor. |
Overheating: | Poor ventilation | Relocate the air compressor to an area with an ample supply |
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| of cool, dry, and |
| Dirty cooling fins. | Clean the outer surfaces of the cooling fins on the pump and |
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| motor assembly. |
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Air continues to leak at motor/pressure switch release valve after motor stops:
Defective pilot valve, the check valve is Remove, clean or replace. stuck open.
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