Hey everyone, this past weekend I was parked and had my car running for about an hour. And out of no where my AC stops blowing cold air. And I realize that the engine temperature was rising. As soon as I turn the AC off. Temperature goes down to normal. What can it be? Thank you in advance 4.6 triton
AC blows hot air then engine overheats!
- Thread starter Harry
- Start date
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99WhiteC5Coupe
Full Access Members
Your electric boost fan may have stopped working, causing the ac to shut down and the engine to overheat.
Hamfisted
Full Access Members
Check the condition of your fan clutch. With the engine off spin the radiator fan by hand and see if there's still some resistance to it. Of course make sure there's nothing blocking the front of the condenser and that it's fins aren't mangled so that air can easily flow through it. I suspect it's just a worn out fan clutch.
Well the fan was still blowing air but it became hot air.
If there's resistance does it mean it's gone bad?
Hamfisted
Full Access Members
No, it's supposed to be moderately resistant to turn.
99WhiteC5Coupe
Full Access Members
I meant the electric radiator / condenser boost fan (which is in addition to the mechanical fan with a clutch to engage / disengage it). I did not mean the HVAC system fan.
Motorcity muscle
Full Access Members
With an older truck I would rinse out the condenser and make sure the bottom baffle is in place under truck.
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Ah ok. I'll check that out. Thank you
