AC clutch not engaging need help! - Ford Truck Enthusiasts Forums
 

Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1987 - 1996 F150 & Larger F-Series Trucks
Log In 


1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

AC clutch not engaging need help!

Reply
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 06-02-2011, 08:15 PM
tfs2403's Avatar
tfs2403 tfs2403 is offline
Junior User
 
Join Date: Nov 2010
Location: Sandusky, Ohio
Posts: 90
tfs2403 is starting off with a positive reputation.
AC clutch not engaging need help!

Hi all,
I need help trying toget my kids AC up and going for the summer.
92 F150 w/5.8.
With engine started, and the AC on "max or normal" setting the compressor clutch does not engage, not even an attempt.
I threw a meter on the wires/plug going to compressor and nothing, no 12 volts, no measured charge on the meter at all - (engine running A/c on).
Now, if you haven't already figured it out I know nothing about A/C systems.
I have checked fuzes, ect. and everything seems to be in order there. Where should I begin to search for the problem.

Thanks for any and all help.

Robb
Reply With Quote
  #2  
Old 06-02-2011, 08:21 PM
dcarnut1's Avatar
dcarnut1 dcarnut1 is offline
Freshman User
 
Join Date: Jan 2005
Location: West Jordan, UT
Posts: 36
dcarnut1 is starting off with a positive reputation.
If the system is low on refrigerant the clutch will not engage. You can bypass this by jumping the low pressure cut off switch. it is the switch mounted on the dryer (black cylinder on pass firewall). Disconnect the wireing harness and jump with a paper clip, clutch should engage.
Reply With Quote
  #3  
Old 06-02-2011, 08:40 PM
tfs2403's Avatar
tfs2403 tfs2403 is offline
Junior User
 
Join Date: Nov 2010
Location: Sandusky, Ohio
Posts: 90
tfs2403 is starting off with a positive reputation.
will give it a try, Thanks
Reply With Quote
  #4  
Old 06-02-2011, 08:45 PM
White 97 xlt's Avatar
White 97 xlt White 97 xlt is online now
Postmaster
 
Join Date: Aug 2005
Location: Cleveland, TN
Posts: 4,332
White 97 xlt has a superb reputationWhite 97 xlt has a superb reputationWhite 97 xlt has a superb reputationWhite 97 xlt has a superb reputationWhite 97 xlt has a superb reputationWhite 97 xlt has a superb reputationWhite 97 xlt has a superb reputationWhite 97 xlt has a superb reputationWhite 97 xlt has a superb reputationWhite 97 xlt has a superb reputationWhite 97 xlt has a superb reputation
If it does kick in and run, don't run it long with the jumper. That switch is to protect the compressor when the freon is low..
__________________
No matter how carefully you choose your words, they'll always end up being twisted by others!
1993 Thunderbird LX 3.8L AOD.
1997 Explorer XLT 4X2 4.0L SOHC 5R55E
1997 F-250 HD Super cab, long bed, 5.8L, E4OD.
Reply With Quote
  #5  
Old 06-02-2011, 09:03 PM
blkF250HD's Avatar
blkF250HD blkF250HD is offline
Posting Guru
 
Join Date: Apr 2011
Location: Hartland, WI
Posts: 1,119
blkF250HD is gaining momentum as a positive member of FTE.blkF250HD is gaining momentum as a positive member of FTE.
Have the system recovered and deep vac'd to check for a leak. The clutch isn't engaging for a reason, there isn't enough refrigerant in the system. If the low side pressure gets too low for an extended period of time the evaporator will freeze up, and the high side pressure will be out of control, possibly damaging the condenser or compressor. Don't try to rig it or anything, have it fixed correctly.


FWIW: being a '92, your truck originally came with R-12. Retrofit kits are available to convert to R-134a, however the oil and seals will need to be changed as they are not compatible.
Reply With Quote
  #6  
Old 06-07-2011, 09:34 PM
tfs2403's Avatar
tfs2403 tfs2403 is offline
Junior User
 
Join Date: Nov 2010
Location: Sandusky, Ohio
Posts: 90
tfs2403 is starting off with a positive reputation.
update

I did jump the plug and the clutch did engage. So what now? Do I need to take this in and have it all checked out by a pro or can I get this thing working with a little elbow grease of my own?
Thanks
Robb
Reply With Quote
  #7  
Old 06-07-2011, 09:39 PM
octaneforce's Avatar
octaneforce octaneforce is offline
Elder User
 
Join Date: Mar 2009
Location: long island
Posts: 936
octaneforce is starting off with a positive reputation.
my truck is a 92 and it called for r12, however i pumped it up with r134a and i havent had a problem. i got the little retrofit things that screw onto the low and high pressure ports. you can get the retrofit kit and pump it up with r134a at your own risk. like i said, mine works great, but others have not had the same luck. they make r12 substitutes i think. the last one ive heard of was freeze12. your most likely low on refrigerant.
__________________
1992 f150 xlt 4x2 5 speed Inline 300 3.55LS
2008 f250 xl 4x2 5.4 standard cab auto
Reply With Quote
  #8  
Old 06-07-2011, 10:35 PM
dcarnut1's Avatar
dcarnut1 dcarnut1 is offline
Freshman User
 
Join Date: Jan 2005
Location: West Jordan, UT
Posts: 36
dcarnut1 is starting off with a positive reputation.
Does the system have any pressure at all? With the compressor off the pressure will equalize across the system, should be around 150 psi.

If you have little or no pressure you have a leak in the system. just fixed one today that had a pinhole in the condensor discharge line.

Has the system been retrofitted? R12 system has small service ports with threads on the outside, R134 system has 2 different sized ports with threads on the inside. R12 systems used mineral oil for lubrication, R134 sytems use Pag oil. Mineral oil is not compatible with R134.

To work on the AC sytem you will need a set of ac gagues, Vacuum pump, refrigerent, seals, dye, etc. It is probably 6's to buy the tools or to pay a shop. If you plan to work on many vehicles, buy the tools. If this is the only vehicle you plan to work on, pay a pro.
Reply With Quote
  #9  
Old 06-08-2011, 09:47 AM
hav24wheel's Avatar
hav24wheel hav24wheel is online now
FTE Chapter Leader
 
Join Date: May 2006
Location: North Dakota
Posts: 10,850
hav24wheel has a superb reputationhav24wheel has a superb reputationhav24wheel has a superb reputationhav24wheel has a superb reputationhav24wheel has a superb reputationhav24wheel has a superb reputationhav24wheel has a superb reputationhav24wheel has a superb reputationhav24wheel has a superb reputationhav24wheel has a superb reputationhav24wheel has a superb reputation
Retro fit kit, and a couple cans of R134, and a cheapy guage should do it. I've converted a couple vehicles and charged up with a single guage kit many times have had good luck.
__________________

Dave
1978 Continental 460 2.50
2003 F250 CCLB 4x4 7.3 4.10 on 35s
1977 Ford Wagoner 351M/C6203/205/D60/10.25
100% posting from iPhone
Reply With Quote
  #10  
Old 09-15-2011, 05:41 PM
blitzz66 blitzz66 is offline
New User
 
Join Date: Jan 2010
Posts: 8
blitzz66 is starting off with a positive reputation.
fuse blew now

did as suggested and the fuse blew clip melted in half so anyone know which fuse it might be because im not getting any air now ive checked all the fuses that have anything to do with ac and they are all good its a 2000 f350 7.3l
Quote:
Originally Posted by dcarnut1 View Post
If the system is low on refrigerant the clutch will not engage. You can bypass this by jumping the low pressure cut off switch. it is the switch mounted on the dryer (black cylinder on pass firewall). Disconnect the wireing harness and jump with a paper clip, clutch should engage.
Reply With Quote
  #11  
Old 09-15-2011, 06:13 PM
blitzz66 blitzz66 is offline
New User
 
Join Date: Jan 2010
Posts: 8
blitzz66 is starting off with a positive reputation.
well found it

well found it bypassing that low pressure switch and clutch still not kickn in any other suggestions
Reply With Quote
  #12  
Old 09-15-2011, 06:23 PM
Bankrupter Bankrupter is offline
Elder User
 
Join Date: Mar 2011
Location: North Central MA
Posts: 923
Bankrupter is gaining momentum as a positive member of FTE.
Quote:
Originally Posted by blitzz66 View Post
well found it bypassing that low pressure switch and clutch still not kickn in any other suggestions
Do you have power to the compressor ? I have seen a few that the wire is broken inside the compressor itself.
Reply With Quote
  #13  
Old 09-15-2011, 06:37 PM
tfs2403's Avatar
tfs2403 tfs2403 is offline
Junior User
 
Join Date: Nov 2010
Location: Sandusky, Ohio
Posts: 90
tfs2403 is starting off with a positive reputation.
update

Well I broke down and took it in to a shop. They found the compressor was bad, and there was a leak too. Due to other issues with the truck and the shop wanting over $500.00 to fix just the A/C we opted not to have it fixed. We are settling on 2/55 A/C (2 windows down, 55 mph)
Use the truck for a year or so and try to move up to something a little better shape.

THanks for the help guys I appreciate it!

Robb
Reply With Quote
  #14  
Old 06-04-2016, 01:26 PM
Kimberlink Kimberlink is offline
New User
 
Join Date: Jun 2016
Posts: 1
Kimberlink is starting off with a positive reputation.
My 2001 f350 ac compressor clutch will not engage. I have voltage at compressor and it will engage if hooked to battery. Replaced connector for clutch. I have 35 lbs on low side when compressor jumped. Any suggestions I have also jumped high and low side switches. Need suggestions please
Reply With Quote
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
2007 Expedition A/C Clutch not engaging Netroamer 2007 - 2014 Expedition & Navigator 0 06-28-2016 09:44 PM
A/C compressor won't start CNGBuff Cooling, Heating, Ventilation & A/C 14 08-31-2015 07:06 AM
Please help 01 7.3 a/c joshua6430 1999 - 2003 7.3L Power Stroke Diesel 24 07-19-2015 11:05 AM
a/c clutch won't engage granny_rocket Cooling, Heating, Ventilation & A/C 2 07-14-2014 07:42 AM
Compressor won't engage bubbafun Cooling, Heating, Ventilation & A/C 2 07-05-2013 01:16 PM


Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1987 - 1996 F150 & Larger F-Series Trucks

Tags
2000, 2003, 2004, ac, air, bypass, clutch, conditioner, cutoff, engaging, expedition, explorer, ford, low, pressure, taurus

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 On
Pingbacks are On
Refbacks are On

Forum Jump



All times are GMT -5. The time now is 10:47 PM.

 

Advertising - Terms of Use - Privacy Statement - Terms of Service - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup