2017 CX-5 AC blowing a bit warm

clownshoes2

2017 CX-5 GT No Tech - 2023 CX-30 GT NA
:
CX-5
Had a couple of really hot days and the AC blows warm/cold-ish in the heat. Will blow cool in the morning or when it's not +40°C out. I have it booked in for July 8th for an AC service. I will keep you guys posted.
 
I sat in line for gas 4 to 5 cars from the pump at @ 95 degrees. The ac started blowing warm before I got to the pump. I put the windows down as I was sweating when I arrived at the pump. Switched the car off and pumped gas while thinking now I have to get the AC fixed. When I fired the car up to leave the AC was blowing cold then and ever since. Don't know why?
 
Don't know why?
If I had to guess, there's a switch that will automatically disable the AC if the cooling fan can't keep up with the heat being rejected by the radiator and condenser. It wouldn't be hard to program it with some combination of coolant temperature and fan duty cycle to trigger AC disengagement. Sitting and waiting in line with no air flow through the heat exchangers other than what the fan provides was more than the system is intended to take. Shutting the engine off (and I'm guessing being in the shade of the canopy over the pumps) gave it a minute to cool down and possibly reset the duty cycle counter. Once you got going again, it was allowed to function normally.
 

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