Skip to content
?
Derek Spudich

Why does my Craftsman Air Compressor stop building pressure at 30psi?

I own a Craftsman Upright 12 gal. tank, 1 HP Air Compressor (oil lubricated). Model number 921166400. I have had this for about 3 years now with no problems. I use it very sporadically, and it can go months at a time without any use at all. Yesterday, while the compressor was running, the sound of the compressor changed slightly, and it sounded like it started to run a little faster. After several minutes, I noticed that it was not shutting off and the tank would not build pressure past 30psi. I also noticed a slight burning smell, but unsure if that was related to the problem or just from the heat of the motor running longer than normal.


I have drained the tank completely and started the compressor again. It takes a 5-6 minutes (which is a long time to start with) to build to 30psi. It will keep running but will not build past that mark.


When the compressor is off, it will hold 30psi and no leaking is noticed anywhere.


So, whats wrong with my compressor??? Gaskets? check valve?


Thanks for your responses.

Tags
Air Compressors , Craftsman , Tools
Sign in to answer a question
4 Answers from these members:
afritz afritz
by afritz afritz Earned 13,820 community points in Craftsman
November 12th, 2010
Answered in 27 minutes
Comment
0 votes
Manage My Life
by Manage My Life
November 12th, 2010
Answered in 4 hours
Comment
0 votes
Derek Spudich
by Derek Spudich Earned 22 community points in Craftsman
November 15th, 2010
Comment
0 votes
Derek Spudich
by Derek Spudich Earned 22 community points in Craftsman
November 23rd, 2010
Comment
0 votes
Didn't find what you are looking for? Ask a question
Get up to
75
% off
On Air Compressors