4.0L V6 Technical Discussions Any questions about engine, transmission, exhaust, tuners/CAI, or gearing can be asked here!

AC Control Switch

Thread Tools
 
Search this Thread
 
Old Jul 9, 2014 | 12:44 PM
  #1  
shelooga's Avatar
shelooga
Thread Starter
 
Joined: Oct 2011
Posts: 31
From: pa
Default AC Control Switch

so we hit 99 yesterday. i do not enjoy sticking to my seats.
after some research, it sounds as if my ac switch is my issue. blower works, all vents work, its just piping hot air. the little indicator lights up, but my compressor isnt turning on.
does anyone know if this is a complex fix? i cant find any sort of 'how to' on this subject. the parts only 30$ but if i have to rip open my dash or electrocute myself im a little concerned
Old Jul 11, 2014 | 05:12 PM
  #2  
Bitter's Avatar
Bitter
2nd Gear Member
 
Joined: Oct 2009
Posts: 256
From: Massachusetts
Default

Maybe a stupid question, but have you verified you have a full charge of Freon?
Old Jul 11, 2014 | 05:41 PM
  #3  
Nuke's Avatar
Nuke
6th Gear Member
 
Joined: Jun 2007
Posts: 16,182
From: PA to KY ('07) to IL ('09) to MS ('10) to FL ('11)
Default

Originally Posted by Bitter
Maybe a stupid question, but have you verified you have a full charge of Freon?
Old Jul 16, 2014 | 12:51 PM
  #4  
shelooga's Avatar
shelooga
Thread Starter
 
Joined: Oct 2011
Posts: 31
From: pa
Default

Originally Posted by Nuke

i havent only because i figured if the compressor wasnt switching on, it had to be related to that
Old Jul 16, 2014 | 05:29 PM
  #5  
Bitter's Avatar
Bitter
2nd Gear Member
 
Joined: Oct 2009
Posts: 256
From: Massachusetts
Default

I'm not positive about Mustangs, but most AC units have a low pressure cutoff for the compressor.
Old Jul 16, 2014 | 07:26 PM
  #6  
jz78817's Avatar
jz78817
4th Gear Member
 
Joined: Jul 2011
Posts: 1,329
From: Michigan
Default

what Bitter said. there's a pressure switch in the A/C lines which will prevent the compressor from running if you lose the refrigerant.
Old Jul 23, 2014 | 12:59 PM
  #7  
shelooga's Avatar
shelooga
Thread Starter
 
Joined: Oct 2011
Posts: 31
From: pa
Default

as usual, everyone is right but me. threw in a can and it works, just not as icy as i remember.

thank you sirs!
Old Jul 23, 2014 | 01:58 PM
  #8  
Derf00's Avatar
Derf00
Gentleman's Relish
 
Joined: Feb 2005
Posts: 13,189
From: AZ
Default

Originally Posted by shelooga
as usual, everyone is right but me. threw in a can and it works, just not as icy as i remember.

thank you sirs!
cos it's probably still low on refrigerant and it has a leak so the system never fully pressurizes when 'on'... get the leak fixed, problem solved.
Old Jul 23, 2014 | 07:01 PM
  #9  
Bitter's Avatar
Bitter
2nd Gear Member
 
Joined: Oct 2009
Posts: 256
From: Massachusetts
Default

I'm glad you got it sorted out without needlessly spending the money on a switch that would not have solved the problem. Those cans of refrigerant seem like the inexpensive way to go and I'm sure they are for some. As for me, I tried it and the needle was bouncing so wildly that I actually over pressurized it. In the long run, I paid the higher "one price fits all" to actually have a mechanic take refrigerant out. It now works fine, so in the long run it was worth the price.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
mrtrodonet
V6 (1994-2004) Mustangs
3
Sep 19, 2020 03:12 PM
lincolnshibuya
V6 (1994-2004) Mustangs
4
Jul 5, 2020 03:05 AM
UrS4
S197 Handling Section
10
Oct 3, 2015 06:23 AM
ChampInSD
5.0L GT S550 Tech
13
Oct 2, 2015 04:55 AM
guitarman376
4.6L (1996-2004 Modular) Mustang
0
Sep 30, 2015 05:54 PM




All times are GMT -5. The time now is 09:14 AM.