Go Back   Tech Support Forum > Automotive Center > Automotive Support

AC Compressor cycles on and off frequemtly

This is a discussion on AC Compressor cycles on and off frequemtly within the Automotive Support forums, part of the Tech Support Forum category. My 2004 Sebring AC compressor cycle on and off rapidly. Freon level is okay.

Thread Tools Search this Thread
Old 06-06-2010, 03:20 PM   #1
Registered Member
Join Date: Jun 2010
Posts: 1
OS: xp

My 2004 Sebring AC compressor cycle on and off rapidly. Freon level is okay.
flyboy1 is offline   Reply With Quote
Sponsored Links
Old 06-06-2010, 03:36 PM   #2
Team Manager, Gaming
Team Manager, Microsoft Support
Team Manager, Hardware Team
Microsoft MVP
Wrench97's Avatar

Microsoft Most Valuable Professional
Join Date: May 2008
Location: S.E. Pennsylvania
Posts: 52,731
OS: Win7

It can be several things, low charge will do that, as will a overcharge condition when the hi side gets too high there is a safety switch that shuts the compressor off to prevent damage. The best way to check is with a set of A/C Gauges.
Wrench97 is offline   Reply With Quote
Old 06-07-2010, 10:56 AM   #3
Raylo's Avatar
Join Date: Feb 2006
Location: Maryland, USA
Posts: 1,548
OS: Win7 x64 (desktop and laptop) and XP Pro laptop

Not sure why you think the refrigerant level is good. But your problem as described is "most likely" low charge due to leak or bad LP switch. The easiest way to check to see what pressure it is cycling is with a gage set, more specifically the LP gage. It should cycle the compressor off at roughly 25 psi and back on again at about 45 psi (specs vary a bit for different car models). If it is cycling around these numbers but rapidly I would suspect a low charge. If it is cycling off much higher then 25 psi the LP switch is probably defective.

There is no foolproof way to get the charge exactly right except but evacuating and refilling with specified amount, but you can get pretty close with some practice and experience. There are lots of variables to play with and a car system is never truly at a steady state like a residential unit, hence the difficulties in diagnosing charge. Get some gages and read this:

Raylo is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is on
Smilies are on
[IMG] code is on
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Post a Question

» Site Navigation
 > FAQ

All times are GMT -7. The time now is 11:59 AM.

vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 2001 - 2015, Tech Support Forum

Windows 7 - Windows XP - Windows Vista - Trojan Removal - Spyware Removal - Virus Removal - Networking - Security - Top Web Hosts


Partially Powered By Products Found At Lampwrights.com