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Air-conditioning fluid coolant pressure > 16 bar. Why?


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Started by '99 Tip Cab this morning (95F outside) and everything went fine initially (low speed fans on due to A/C on).

However, after about 2 mins sitting the high-speed fans kicked in. Given the car was still warming up (and AC hack said 57C), I assume that it means that the A/C coolant pressure was high (over 16 bar). What causes that?

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A/C pressure will change with ambient temp. I thought that when the A/C was engaged the fans where always on high speed.

I see.. But 16 bar seems really high? Although I'm not expert.

When the A/C is engaged the low speed fans run unless the A/C fluid pressure is > 16 bar

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