kevinC Posted May 28, 2006 Share Posted May 28, 2006 As I drive down the road the a/c cycles on and off about every three seconds. I shorted out the low pressure cut off switch on the filter dryer and the problem is still there. I suspect it might be the evaporation thermal switch but I hate to pull out the evaporator to check this. Has anybody had similar issues. 96 legacy 2.5. Also if I turn the blower on high and roll down the windows it seems to real help the problem. I have also checked 134a pressures and everything seems to be normal. Quote Link to comment Share on other sites More sharing options...
Legacy777 Posted May 28, 2006 Share Posted May 28, 2006 If you're sitting there idle, does the compressor cycle on and off? Or does it only do it when you're driving? Quote Link to comment Share on other sites More sharing options...
kevinC Posted May 29, 2006 Author Share Posted May 29, 2006 Also short cycles at idle, but the cycle time is alot longer. Maybe around 30 seconds. pressures seem stable while at idle. (Not kicking out on high pressure). I have not shorted out the high pressure switch yet. I will try that tommorrow. Quote Link to comment Share on other sites More sharing options...
97subaruGT Posted May 29, 2006 Share Posted May 29, 2006 I had a similar issue on my 97 Legacy. More than likely, your AC system is overcharged. Once I bled some pressure off, it went back to normal. Quote Link to comment Share on other sites More sharing options...
avk Posted May 29, 2006 Share Posted May 29, 2006 The high-pressure cutoff occurs at about 400 psi. Was any AC work done before? Quote Link to comment Share on other sites More sharing options...
Legacy777 Posted May 29, 2006 Share Posted May 29, 2006 What were the pressures you were seeing, and what was the ambient temperature when you took those readings? Quote Link to comment Share on other sites More sharing options...
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