Did you check if the cooling fans are working? this is very important, because they lower the pressure of the freon before passing throughout the expansion valve and getting into the evaporator,more pressure means highter temperature, , of course when you are driving the air flow throughout out the condenser lowering the freon temperature in the condenser and lowering the freon pressure at the high side, tha's way the temperature inside the car is lower ... you can have a similar problem if the condenser is partially plugged..hope this was very helpful...
You could have to much oil or freon in the system.
For car running hot and overheating issues, I suggest to you go
through this help links. Click this link below and go through the
troubleshooting procedure to take care of the problems: ----Car runs hot? http://howtobyme.blogspot.com/2011/11/car-runs-hot-in-traffic.html
-----------All types of car overheating problems and
troubleshooting?
http://technoanswers.blogspot.com/2011/11/all-types-of-car-overheating-problems.html
Car freeze overnight and started overheating while driving?http://technoanswers.blogspot.com/2012/01/car-freeze-overnight-and-started.html-----------Engine Overheats and heater blowing cold?
http://howtobyme.blogspot.com/2011/11/engine-overheats-and-heater-blowing.html
---------------------------
Car overheats and Air blows hot at idle?
http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html
--------overheating? http://schematicsdiagram.blogspot.com/2011/12/buick-century-overheating.html
----------Car engine Overheats and transmission starts slipping?http://schematicsdiagram.blogspot.com/2011/12/car-engine-overheats-and-transmission.html
----------This details will help.Thanks.
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I am not sure. I took the car to the mechanic who told me that it needed a new expansion valve. Which he did replace. I have been searching the net for possible fixes and noticed that everything should have been drained and cleaned during this process for optimal results. I assume he knew what he was doing and did vaccum and clean it out. Can't get him on the phone now to find out. Air doesn't work as well as before he repaired it.
Has condensor been cleaned well, or inspected?
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