Hey guys, I have a 05' Mitsubishi Outlander AWD that I drive to work and lately when the AC is on it tends to overheat. I flushed the coolant and it was fine for a few days but now it is doing it again. At night it is fine due to the lower temps but this is baffling me. There are no coolant leaks and the car has been maintained perfectly with all the scheduled dealer pit stops. I am thinking maybe a bad thermostat, what do you guys think?

first guess would be thermostat.

Fan fuse?

S

Check the Condenser and Radiator cores for leaves, bugs, etc. Clean as required then run it until warm and feel the bottom portion of the radiator core; if it's colder then the top it's time for some radiator work.

Isn't it under warranty? They have 6yr/60K right?