2006 Toyota 4Runner A.C. Does not go on.

Tiny
LAWMAN808
  • 2006 TOYOTA 4RUNNER

Air Conditioning problem
2006 Toyota 4Runner V8 Two Wheel Drive Automatic 43,600 miles

My a.C. Does not go on but the switches do. Also, the "auto" roll down feature for the drivers side window stopped working at the same time. (I suspect a fuse problem)

Thank You, Walt. (Honolulu, Hi)

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Tuesday, September 8th, 2009 AT 1:15 PM

3 Replies

Tiny
RASMATAZ
  • MEMBER

On many systems, the compressor will not turn on if the refrigerant is low because the "low pressure safety switch" prevents the compressor clutch from engaging if system pressure is low. This protects the compressor from possible damage caused by a lack of lubrication.

One of the first things you should check, therefore, is compressor engagement. If the compressors magnetic clutch is not engaging when the A/C is turned on, the problem may be a blown fuse or a wiring problem. If the fuse is blown, replacing it may restore cooling temporarily. But the underlying reason for the fuse blowing in the first place needs to be identified and corrected to prevent the same thing from happening again.

If the magnetic clutch is receiving voltage but is not engaging the compressor, the clutch is defective and needs to be replaced. If there is any evidence of leakage around the compressor shaft seal, the seal should also be replaced.

If the clutch works but fails to turn the compressor (the belt may squeal in protest!), The compressor has seized and needs to be replaced.

Compressor failures are usually the result of loss of lubrication, which in turn may be due to low refrigerant in the system, a blockage (such as a plugged orifice tube which prevents refrigerant and oil from circulating to the compressor), loss of lubricant due to leaks or improper service procedures (not adding oil to the system to compensate for oil lost through leakage or component replacement), or use of the wrong type of lubricant

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Tuesday, September 8th, 2009 AT 2:02 PM
Tiny
MIKE HASBROUCK
  • MEMBER

If anyone with ac problems with their Toyota 4 runners need to check their clutch fan if it goes out the ac is the first thing to go. An honest mechanic replaced my worn out clutch fan my ac is working great

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Thursday, April 13th, 2017 AT 7:41 AM
Tiny
2CARPROS KEN
  • ADMIN
  • 7,678 POSTS

Hey,

Great addition to this thread! Please feel free to help out on the site whenever it can add information that will help.

Best, Ken

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Sunday, April 16th, 2017 AT 9:44 AM

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