About Air Compressors.com

More than 16 years on line helping folks with their air compressor problems!

You are here: Home / Unloader valve leaks when compressor running?

Unloader valve leaks when compressor running?

by joe
(ogilvie, mn)

Unloader valve only leaks while compressor is running?

The Unloader valves on two pressure switches
The Unloader valves on two pressure switches

_________________

Joe, the air compressor unloader valve is supposed to open when the air compressor reaches the cut out pressure level and the motor stops.

When the compressor starts again, the unloader valve is supposed to close, to ensure that the compressed air that is being generated by the air compressor pump is directed into the tank.

You don’t indicate what your compressor is, or what the pressure switch / unloader valve combination is on your air compressor making it harder to diagnose the problem and solution.

In the photo above you can see the pin that protrudes from the side of the pressure switch. It is this pin that toggles this unloader valve.

So, first you have to make sure that the unloader valve is actually opening and closing by monitoring it while the air compressor runs up to cut out pressure and stops.

Then, if the unloader is actually working, the problem is probably a leaking unloader valve.

Dismantle it, clean it, reassemble it, and test, or just replace it.

Subscribe to this page / comment / post
Notify of
guest
guest
0 Comments
Inline Feedbacks
View all comments

Search here to find the specific compressor info you need!

The latest pages added to this site include…

  • The Porter Cable compressor tank is full, but I can’t get air to come out? – December 2020
  • The compressor appears to compress the air but there no air at the hose on a 921.166460 – December 2020
  • Bambi 75/250 won’t build air after being on its side – November 2020

Getting around this site…

  • About Air Compressors
  • Sitemap – About-Air-Compressors.com
  • About Different Brands of Air Compressors
  • Calculating CFM
  • Identifying An Older Air Compressor
  • Jim Graham

Troubleshooting a compressor. Issues common to all and by the compressor make.

  • Troubleshooting Your Compressor
  • Compressed Air How To
  • Picking A Compressor
  • Air Compressor Parts
  • What Is My Compressor Worth

To help you understand compressors!

  • Compressed Air Treatment
  • General Compressed Air Information

Disclosures etc.

  • Privacy Policy
  • Disclaimer & Copyright Policy
  • Contact About-Air-Compressors.com
Want to bragg about your gorgeous computer rebuild? We'd welcome it here!"

RSS feed information.

If you wish to be updated when new comments are posted, add: about-air-compressors.com/feed/ to your RSS reader. Thanks.

© 2021 · about-air-compressors.com ·

wpDiscuz