Hi Scotty,

This is my first summer since I have bought a 2.0 ecoboost ford fusion with 90000 miles. Everything has been going pretty well so far, until the it got too hot. Car started overheating under high stress only. If I have the A/C on and am going uphill, stuck in traffic or going really fast. I've also noticed that A/C starts blowing hot air when idling for a long time. If the A/C if off I do not have this issue and when it overheats just turning the A/c of is enough to cool the engine down. There are no check engine lighths no fault codes nothing. Do you have any idea what it can be? The coolant does not look bad, but I'm not sure when it was replaced, could it be just bad coolant?