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A/C low refrigerent

Tiny
PMAKKI
  • MEMBER
  • 1998 CADILLAC DEVILLE
  • V8
  • FWD
  • AUTOMATIC
  • 66,000 MILES
1998 DeVille low refrigerant light comes on, ac shut down even though refrigerant is not low.
Tuesday, February 15th, 2011 AT 12:36 AM

8 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
What method used to check fron charge?
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Tuesday, February 15th, 2011 AT 8:39 PM
Tiny
PMAKKI
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  • 7 POSTS
Brought it to the shop, they serviced it, drove it, message came back on, changed low press. Switch, drove it, came back on, checked for leaks, no leaks, pressure still holding. Message still exists.
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Tuesday, February 15th, 2011 AT 9:25 PM
Tiny
DOCFIXIT
  • MECHANIC
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System needs to diagnosed using a scan tool was that done? If yes what was DTC code? If no need to have that done. Message not totaly reliable diagnosis
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Thursday, February 17th, 2011 AT 1:59 PM
Tiny
PMAKKI
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  • 7 POSTS
OK, I do not have the diagnostic equip. You mention, what would cause this problem other than low freon or low pressure cutout switch? All fittings are dye checked.
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Friday, February 18th, 2011 AT 12:24 PM
Tiny
DOCFIXIT
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A fault in PCM that's why need to get car scanned
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Saturday, February 19th, 2011 AT 4:36 PM
Tiny
PMAKKI
  • MEMBER
  • 7 POSTS
Scanned the system with obd 2 scanner, no codes showing
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Saturday, February 19th, 2011 AT 4:59 PM
Tiny
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  • 7 POSTS
I also jumped the low pressure switch and system works fine, will replace switch again, maybe bad out of stock.
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Saturday, February 19th, 2011 AT 5:02 PM
Tiny
DOCFIXIT
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If jumpered and works light out then agree switch maybe faulty. Good Luck
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Saturday, February 19th, 2011 AT 5:56 PM

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