Originally Posted By: sleddriver
Originally Posted By: badtlc
I have a 2007 Escape. When it gets above 85F outside, it has a real hard time cooling down the interior. When I hit 90F+, it is cooler to roll windows down sadly. My shop says all the pressures read good and the delta between outside air and inside when using fresh air intake A/C setting is close to 30F. The problem is the day they tested it was cooler than 80F outside.
So, my question is, could there be an issue where an AC performs normal at lower ambient temps but not at higher temps due to higher pressures that don't indicate problems at lower temps?
Somethings wrong...here with 100°F ambient temps + 55% Rh, the sled A/C will blow 38°F air on recirc, even with fan set on MAX. That's for a white wagon with lots of glass. I do have 3M metal IR film all around. Sure makes a difference. The point is my delta-T is much higher than yours....on an 18 yr. old original A/C system too boot.
Your pressure line should be hot and the suction line cold & sweating. Condensor/radiator fan working? Blocked cabin air filter? Weak blower motor? Other obstruction blocking air flow to evap. core?
Mist the condensor and see if the vent temp. drops. IF so, that's a clue.
Taking temps measurements on recirc doesn't provide you any useful data. The coils are designed to provide a specific delta-T which is the difference between outside temp and supply air. to get that measurement, you have to be running outside air across the coils and recirc setting doesn't do that.