Question about 2003 Toyota 4Runner

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Intermittant problem. Goes and comes. No

Intermittant problem. Goes and comes. No consistency when it occurs, but will go into a cycle where it does this for 1 to 2 weeks and then disappear for 3 months. Problem: When the A/C is turned on, the A/C will run for a while and then the light will begin to flash on the A/C button. Frequently when the issue first appears in a cycle, if the AC is turned off and back on the A/C will run for 10 to 15 minutes and then stop and flash again. Subsequent on and off cycling decreases the operation time between resets until the system will not run at all for a while. The unit is charged and works.
Is there a TSB out there for this problem? A local AC shop has had trouble fixing it.

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  • Samuel Charles Spriggs May 11, 2010

    I have seen a similar problem. It sounds like the evaporator core is icing. Could be a malfunctioning deicing switch or perhaps a blockage in the duct reducing the air flow. Is it possible that leaves/trash have gotten into the ductwork thru the vent under the windshield?


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I have a 2003 4Runner and had this same problem about 2 years back. I am not a mechanic, but I took it to Toyota and they replaced the A/C Relay, which costs about $80, and I have not had an issue since. Hey, it's worth a try.

Posted on Jul 19, 2009

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...It could be an icing issue; however, my experience leads me to tell you that the AC compressor revolution sensor is the likely culprit.

Posted on Jul 18, 2009

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