AC compressor clutch cycling on and off very quickly - Ranger-Forums - The Ultimate Ford Ranger Resource

General Technical & Electrical General technical and electrical discussion for the Ford Ranger that does not fit in any other sub-forum.

LinkBack Thread Tools Search this Thread
Old 06-22-2015
Thread Starter
Join Date: Mar 2015
Location: Ozark AL
Posts: 5
AC compressor clutch cycling on and off very quickly

Hello folks. I'm having a issue with my AC. I took the motor out myself to put in a crank kit and when I put it back in I didn't recharge ac for a month or so but upon recharging it is now cycling on and off quickly. It will cycle on for 5 seconds and off for 5 seconds over and over. I know it has enough refrigerant and I can feel it trying to get cold but will not stay engaged long enough to cool off. Any ideas? I'm thinking it could be a relay but really not sure. Any advice is much appreciated thanks guys
Reply With Quote
Old 06-23-2015
RF Veteran
iTrader: (1)
Join Date: Jan 2014
Location: Vancouver, BC
Posts: 7,580
First check the power at the compressor, put a volt meter or test light on the two wires on compressor, leave compressor hooked up and engine idling, it will have 12volts(13.5v) when compressor should be on.
If the voltage is cycling on and off then there is a problem with the pressure in the system.
If voltage stays on but compressor cycles off the field coil or air gap on compressor is the problem.

If you disconnected the lines and didn't plug them, then there is probably moisture in the system, and that can cause a plug.
You may need to vacuum out the system and replace the drier as it has absorbed too much moisture.

The pressure switches detect high pressure after gasses are compressed, this prevents lines from exploding, and low pressure switch when refrigerant is low, this prevents compressor running dry and burning up.

The gases are compressed which heats them up, this is the high pressure side, they are then allowed to decompress in the cab which causes the lines to cool rapidly, even freeze on the outside, this is the low pressure side.
Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Compressor Cycling rangebob General Technical & Electrical 14 04-30-2015 08:17 PM
AC Compressor Cycling fatfett General Technical & Electrical 3 08-19-2014 09:08 AM
Ac compressor cycling 08hybridok General Technical & Electrical 14 06-06-2014 09:54 PM
Why won't my A/C compressor stop cycling? deddhead General Technical & Electrical 13 08-30-2011 08:19 PM
AC Compressor Cycling On And Off Ringhead General Technical & Electrical 10 06-16-2006 12:35 PM

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

All times are GMT -6. The time now is 04:17 PM.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.