• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 1994 - 1995 Specific Tech

A/C Compressor Not Engaging

  • Thread starter Thread starter 94GTPilot
  • Start date Start date Sep 21, 2010
9

94GTPilot

Member
Mar 26, 2006
82
0
6
Sep 21, 2010
#1
  • Sep 21, 2010
  • #1
Hey guys. I just relocated to South Texas for jet training for the Marines, and had my 94 Mustang GT shipped from my hometown in CA to our new house down here. It had been in my parents driveway for almost a year before it shipped to TX. After a few days, I noticed that when I turned the AC switch inside the car on, I didn't hear the compressor click on, and obviously wasn't getting any cold air.

I did a search on here, and know that there's a low pressure switch that disables the compressor from engaging so that it doesn't burn itself up. My question is, where do I start my trouble shooting? I also read about using a wire to jump a switch, allowing the compressor to engage momentarily. That, or is there a way I can measure the pressure on the low pressure side and get a reading that would let me know whether or not the problem is related to not enough refrigerant..

Thanks for any help!
 

toyman

10 Year Member
Jul 19, 2007
1,944
54
79
Vernon BC
Sep 21, 2010
#2
  • Sep 21, 2010
  • #2
Just jumper the cycling switch on the accumulator/drier. If the AC clutch engages the switch is the problem, not uncommon.
 

revhead347

Apparently my ex-husband made that mistake.
20+ Year Stangneter
Jun 14, 2004
9,288
1,631
214
Acworth, GA
Sep 21, 2010
#3
  • Sep 21, 2010
  • #3
The easiest way is to jump the switch with a paper clip. The switch is on top of the accumulator on the passenger side of the firewall. Pull the plug out, and jump the two ends of the plug together with the paper clip. If the clutch engages, then it's either a faulty switch, or your gas pressure is too low.

Kurt
 
You must log in or register to reply here.

Similar threads

82 Gen 1 Coyote Swap AC Questions...
  • thinkfaster
  • Aug 14, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
1
Views
296
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Aug 15, 2025
thinkfaster
M
Progress Thread mnky99 2001 V6 evap core, ac compressor, heater core replacement
  • mnky99
  • Sep 5, 2025
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
1
Views
424
1996 - 2004 SN95 Mustang -General/Talk- Sep 5, 2025
mnky99
M
J
2003, 3.8l with air conditioning problems
  • Jimb0z '03
  • Nov 3, 2024
  • 1996 - 2004 SN95 Mustang -General/Talk-
Replies
6
Views
405
1996 - 2004 SN95 Mustang -General/Talk- Nov 4, 2024
Jimb0z '03
J
J
Low side AC port cap
  • JJHstang
  • Jul 18, 2024
  • 1965 - 1973 Classic Mustangs -General/Talk-
Replies
2
Views
644
1965 - 1973 Classic Mustangs -General/Talk- Jul 18, 2024
Mustang5L5
2004 Mach1 A/C
  • SMOKEDYA
  • Jul 22, 2023
  • SN95 4.6L Mustang Tech
Replies
0
Views
892
SN95 4.6L Mustang Tech Jul 22, 2023
SMOKEDYA
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 1994 - 1995 Specific Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?