Kobalt (Abac America) Air compressor Parts — Browse All Models

Troubleshooting tips for your Kobalt air compressor when it won't start

Check the electrical outlet for power. Reset the house circuit breaker if the electrical outlet is dead. If the electrical outlet works, shut off the air compressor and bleed all the air from the tank. Flip the pressure switch control lever to the Auto position.

If the pump starts when the tank is empty, then the check valve may be stuck open. The check valve prevents tank air from back flowing to the pump. A stuck-open check valve causes high pump head pressure, preventing the compressor from restarting. Test the check valve by allowing the compressor to fill the tank until the pump shuts off. Then pull the ring on the safety valve to bleed air out of the tank to reach the cut-in pressure, so the pressure switch attempts to restart the motor to refill the air tank. If the compressor won't start with air in tank, replace the check valve.

If the compressor won't start with an empty air tank, replace the pressure switch if it isn't activating the pump motor. Replace the pump motor if it doesn’t start when activated by the pressure switch.

Common Kobalt air compressor repair parts

• Check valve. The check valve prevents tank air from back flowing to the pump. A failed check valve will apply high air pressure to the head of the pump preventing the motor from restarting once the tank has filled. If the motor starts when the tank is empty of air but won't restart when the tank is full, replace the check valve.
• Safety valve. The safety valve pops open to relieve excessive air pressure if the pressure switch fails to shut off the air compressor at the cut-out pressure setting. Replace the safety valve if it leaks or pops open at normal operating pressure.
• Air tank. Don't try to fix a leaking air compressor tank. Replace the tank if it leaks air.
• Motor. The motor drives the piston or pistons that compress the air in the pump. Replace the motor if it doesn't run when it gets electrical current and the air tank is empty.