A/C not working

Tiny
BRANDON24
  • MEMBER
  • 2005 KIA SPECTRA
  • 4 CYL
  • 2WD
  • MANUAL
  • 78,000 MILES
I have a problem with my A/C, The A/C compressor is not getting voltage. When I select the switch for A/C the compressor will not turn on. I know the air duct door is working correctly to choose heat or cold.I have checked with a multimeter for power at the compresser, one lead on ground and the other on the plug, I have checked the triple pressure switch and am not getting power to either of them with A/C selected. I know I have freon in the system. The A/C belt is tight and in good condition. I have checked all the a/c fuses. I have checked the A/C relays and swapped them with same relays. When I jump the A/C control relay with a jumper wire the compressor turns on and the a/c blows cold.I checked for voltage at the A/C control relay and at 85 and 30 terminals there is voltage. Terminal 86 and 87 does not have voltage. It seems like the relay is not getting a power signal when the A/C button is pressed/turned on. Do you think the A/C control switch assembly is bad? On the control switch when you select A/C the button still lights up as if it were working. What are other possible causes of the A/C not working.
Monday, January 18th, 2010 AT 7:35 PM

4 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
It sounds like you may not have enough freon in the system I would go over this guide first.

https://www.2carpros.com/articles/air-conditioner-how-to-add-freon

This guide can help as well.

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

Was this
answer
helpful?
Yes
No
+2
Monday, January 18th, 2010 AT 7:43 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,895 POSTS
The compressor relay is controlled by the ECM and there are a few components in between,, here is a wiring diagram to get you started. The controller do go out on these cars though. There is a guide to help you test.

https://www.2carpros.com/articles/how-to-check-wiring

Check out the diagrams (Below). Please let us know what you find. We are interested to see what it is.
Was this
answer
helpful?
Yes
No
+7
Thursday, August 11th, 2016 AT 12:09 PM
Tiny
BROBENAVIDEZ
  • MEMBER
  • 2 POSTS
Hey, I was wondering where you got that diagram from? I cant see it, it is super blurry.
Was this
answer
helpful?
Yes
No
Thursday, October 24th, 2019 AT 2:44 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,895 POSTS
Yes, I updated the post check the diagrams again please. Let me know if you need anything else to fix the problem. We are happy to help.
Was this
answer
helpful?
Yes
No
Saturday, October 26th, 2019 AT 1:38 PM

Please login or register to post a reply.

Sponsored links