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wcnesta: 1 year ago | Last edited at 7:58AM on 7/11/2011

Why is my 2001 Jag XK8 inside air hotter than outside air after car driven several miles?

The inside air flow gets hotter than the actual outside air temp after the car is driven about 20 miles then shut off for several minutes then driven again. If I select the inside air function the air out of the climate control gets a little cooler. If I turn on the air condition everything cools down and stays that way until I shut it off for a while then the outside air fow starts to get hotter after several minutes.
I suspect that the condenser coils, inside the climate control box under the dash, are getting hot due to the condenser cooling hose lines inside the motor cabin transferring motor heat to these hoses and making the coils hot. As the outside air blows in, these coils transfer their heat to the outside air causing the cabin air to get hotter than the actual outside air. I do not know if my theory is right about this. Does anybody else have any ideas about this problem? Is there a possible fix for this? I did check the problem of the plastic gap that leads to the input air duct and corrected that already but no help with this problem.

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Answer 1

Risch: 1 year ago via iPhone

There is a door under the dash that allows the air to either flow over the heater core (for heat) or the evaporator core (for a/c). The door is not fully closing off the heater core and that's where the heat is coming from. Older cars used vacuum to open and close it or a cable, newer ones use electric motors. Either the controls in the dash are bad or the motor is bad. Also the door can break and cause this problem...

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wcnesta: 1 year ago

Have you had this problem on your car? Is it a Jag?

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Risch: 1 year ago via iPhone

I've been in the automotive field for almost thirty years. All cars a virtually the same...

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Answer 2

shanegalang: 1 year ago via iPhone

The heater is on.

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wcnesta: 1 year ago

If that were the case the hot air would start as soon as the engine temp was at it's normal running temp. This condition happens well after the engine is at normal operating temp. I have the temp control set to 65 degrees.

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Answer 3

geekout234: 1 year ago

I think the problem can be as a result of a problem with your car?s coolant. I would advise you to contact the nearest authorized dealer or a good mechanic.

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