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Q: A/C intermittently fails on 2003 Mitsubishi Outlander

Enthusiast 01be16a5a93688912f14755221fb15211b518d9a788cf01b455e03cc1bd585ac
My A/C works very well in the morning, but the compressor will not run in the afternoon.

Cooling fans were recently inconsistant & eventually inoperable; Mitsu mech (by phone) suggested a possible relation. Replaced fan assy this weekend, but problem persist.

When it cools, it cools real well. The only consistancy I've found so far is the time of day. Pretty hot afternoons here recently. Don't see how that would effect the system. Fault persist even when engine has been off & is 'cooled'.
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
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R 134 has a fairly high expansion rate. What is most likely occurring is, your freon level is filled slightly over normal capacity. when it's cool outside, the system runs normally but when the temp. climbs in the afternoon, the freon expands above the acceptable pressure level, tripping the high pressure switch to disable the compressor. Have a professional remove 1/4 lb. at a time during the hottest part of the day till system runs normally. if freon level is OK, you may have a partial blockage in the system causing pressure build up in the same manner. Good luck.
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