Air Compressor Leaking Air From Unloader Valve

When the the air compressor unloader valve is working correctly the pressure in the tank has dropped to below the normal cut in pressure level of the pressure switch the pressure.

Air compressor leaking air from unloader valve.

If air leaks out the unloader when the pump stops replace the check valve because the check valve leaks air back towards the unloader. When this happens this means that the valve probably has a leak. I am trying to figure out what compressor i have and which parts to check for needed cleaning or if there are replacement parts for. Plug the compressor back in.

When the air compressor reaches the normal cut out pressure and stops but you notice while the air compressor is off that air is leaking out of a valve attached to or perhaps inside of the air compressor pressure switch. Replace the safety valve if it leaks air constantly. 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. I have included pictures of the air compressor.

This is evidenced by the continuous hissing sound that you will hear. Sometimes the air evacuating from the unloader valve would not stop. Air continuously leaks out of the unloader valve on your air compressor and this is a problem. Well if air continuously leaks out of the unloader valve then the compressor tank is emptying and the compressor needs to restart to replenish the air in the tank to get back up to cut out pressure so it can stop on its own.

Because the unloader valve is installed in an air line all of the air could escape. Unloader valve is leaking air. This will effectively emulate the operation of the unloader valve as any air trapped over the piston will flow into the tank as the tank pressure drops. My little 2 gal.

The valve on the outside of the pressure switch may look something like the one in the image. The unloader valve is leaking air when the compressor is running. My air compressor just started to leak air continuously when the unloader fires off as the motor is cut off. The unloader valve is only leaking when the compressor is running.

If your electrically powered air compressor is having a hard time starting try pulling the power cord and opening the drain valve to void all air from the tank. Hotdog compressor was working very well till last month when the unloader valve opened while the compressor had kicked in to build up the. Air compressor unloader valve leaking.