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Why won't my air compressor tank hold air?
less than a minute readApr 19Lyle Weischwill
The air compressor's air tank will rust and eventually leak air if you don't drain condensate water from the tank through the tank drain valve regularly. Replace the air tank if you see rust on the bottom of the air tank.
Loose air tube fittings let air to leak out of the tank, so tighten all air tube fittings to prevent air tank leaks.
A failed check valve lets tank air to escape through the unloader when the pump stops running. Replace the air compressor check valve if air leaks out the unloader when the pump motor stops.
A leaky safety valve or leaky drain valve can also allow tank air to escape. Replace the leaky safety valve or drain valve.
These repairs may help solve your air-compressor problem
Replace the air compressor 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.
Air compressor check valve
Find the required part specific to your product.
May 01
How to replace an air compressor check valve
If your air compressor won't restart after the tank fills, the check valve might be the problem. Th…
Repair time and Difficulty
15 minutes or less
Tighten air compressor air tube fittings
Inspect air tube fittings regularly. Firmly tighten any leaking air tube fittings.
Tighten air compressor air tube fittings
Find the required part specific to your product.
May 01
How to rebuild an air compressor pump
If your air compressor's gauges show that the tank isn't building pressure, the pump might be the pr…
Repair time and Difficulty
45 minutes or less
Replace the air compressor 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 compressor safety valve
Find the required part specific to your product.
Replace the air compressor tank
Don't try to fix a leaking air compressor tank. Replace the tank if it leaks air.
Air compressor tank
Find the required part specific to your product.