2002 Ford Explorer whine when A/C is on

Tiny
ELESTER12
  • MEMBER
  • 2002 FORD EXPLORER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 101,000 MILES
Hello. I own a 2002 Ford Explorer. My A/C does not cool well unless I�m driving at a constant speed on the highway with the RPM's around 2000-2300. When I come to a stop the A/C efficiency reduced and when I start to accelerate the A/C lines seems to whine/howl. The whine changes with different RPMs. The whine also affects the cooling performance. I had my Freon level checked twice. The dealer told me they don�t know what it is. Any advice would be appreciated. Thanks!
Thursday, August 20th, 2009 AT 2:13 PM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
AIR CONDITIONING PROBLEM: NOISE

Noise from the compressor usually means the compressor is on its way out. But noise can also be caused by cross-contaminated refrigerant (operating pressure too high), air in the system or the wrong type of compressor lubricant.
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Thursday, August 20th, 2009 AT 2:18 PM
Tiny
ELESTER12
  • MEMBER
  • 2 POSTS
I had the system recovered and then recharged. I was thinking it might be the compressor clutch or the expansion valve. Could either of those cause the whine noise while the a/c is running?

When replacing the a/c compressor what other parts should I replace?

Thanks
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Friday, August 21st, 2009 AT 7:29 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be the clutch, you sure the belt is not slipping-Just replace the compressor itself. Have you tried listening to it real close to ID where the whine is coming from.
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Friday, August 21st, 2009 AT 12:19 PM

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