Question about Air Tools & Compressors
4 gal. 3/4 hp. air compressor wont turn on. what are the possible causes...and the way to fix them?
1st check for power at the pressure switch. Take the cover of the switch and make sure you have line voltage at the terminals from the wall outlet.
if no voltage>replace cord or plug end with proper gauge wire.
If voltage, then, while you have the cover off of the switch **Make sure it is not plugged in** and operate the on off switch and visually check the operation of the switch. You should see some flat copper terminals that, when the switch is turned on, kinda rotate and drop onto some other copper terminals. The connection is kinda like points on a old car ignition, little pads on each copper thingie contact each other. I have seen these little pads become pitted and burnt from arcing. Try to clean these with a small file or pick if they are corroded. Get some electrical contact cleaner and clean the switch completely, *it is not only electrical, but is also mechanical*. Switches will intermittantly work, replace the whole pressure switch if there is heavy wear, charring or working intermittantly.
If this is all good, check the wires coming out of the switch for power to the motor, replace if necessary. If this is ok..
You probably have a bad motor. I have not had much success in revitalizing motors, its usually better to just replace it.
Posted on Nov 21, 2008
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Oct 09, 2014 | Craftsman 1 Hp, 4 Gal. Air Compressor
May 17, 2011 | Craftsman 15 gal Air Compressor 3 hp UMC...
Apr 26, 2010 | Craftsman 3 gal. Air Compressor, 1.5 hp,...
Feb 07, 2010 | Craftsman 1 Hp, 4 Gal. Air Compressor
Sep 28, 2009 | Craftsman 3 gal. Air Compressor, 1.5 hp,...
Jul 15, 2009 | Craftsman 3 gal. Air Compressor, 1.5 hp,...
Mar 11, 2009 | Craftsman 3 gal. Air Compressor, 1.5 hp,...
953 people viewed this question
Usually answered in minutes!