Question about 2002 Jaguar S-Type

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Ac compressor does not turn on when car has been sitting & it's hot outside. Works fine in the morning.

My jaguar ac blows hot air when hot outside. when cool outside ac works. noticed that compressor does not turn on when hot outside. can you help please?

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  • stephen gosser May 11, 2010

    what are the pressure readings when its hot vs cold?

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Either the freon charge is about 1/3 low, or the expansion valve needs to be replaced. Freon is getting into the evaporator, but not in great enough volume to cool the air unless it is coming in cool to start with. check your ac charge, and if it is full, then have it emptied, change out the expansion valve, and recharge it

Posted on Sep 04, 2009

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AC works for about 300 miles then stops and blows hot air. New AC compressor and freon charge. After sitting for a while it will again blow cold.


I think you have a similar problem to mine. At highway speeds is when it happens. And it is not blazing hot? Right?
Your evaporator is freezing up - as this happens the ice surrounding it prevents the flow of air over the evaporator coils and the result is warm air coming out of the registers. If I turn off the AC for about ten minutes and let unit melt the cold air comes back. This does not occur in stop and go driving.
I combat it by either running the fan at a higher than normal setting to increase air flow over the evaporator and then turning off when it gets too cold, OR using the air control to allow warmer outside air to enter into unit at highway speeds to prevent freezing up.
Newer cars have more sophisticated sensors and controls to prevent this but some older vehicles are subject to this anomaly.
Since it works fine under normal conditions I have not messed around with the freon level in system. If you release a tad of refrigerant the low pressure switch will shut off the compressor sooner and help minimize ice buildup. Good luck.

Aug 19, 2016 | 2000 Ford Taurus

1 Answer

Compressor or control switch? So i have a 2002 nissian altima and the ac stopped worker, i took it to two different mechanic shops and got two different answers. i have no desire to take it to a third...


your friend should be able to check the switch with a multimeter to see if it is good it could also be your hot & cold dial and not the control panel but on some models you have to change the whole panel if the car is blowing hot air hotter than the outside temperature it could also be the door actuator in the dash that is not openning & closing correctly allowing the hot air from your heater core to mix with your cold air from your a/c

Aug 25, 2013 | Cars & Trucks

1 Answer

A/c works fine in the morning, blows out vents at 55* - 59*. later in the day, and as it gets hotter outside, a/c blows hot air. What's up?


could be slightly low on charge-or cooling fan is not working-as the temp outside goes up the ac needs to be more efficent to blow cold air--and really 55 is not that cold--depending on outside conditions should be able to blow at low to mid 40 s

Aug 16, 2010 | 2003 Ford F250 Super Duty Crew Cab

1 Answer

Freeon is good dont know what else it could be. when its cold out the ac works fine but when its hot it doesn't blow cold? WTF


The ac will blow sold when its cold outside.It is just the air from the outside. You need to check to see if the ac clutch is turning when the ac is switch own.You may have a bad ac compressor

Mar 05, 2010 | 2002 Mitsubishi Lancer

2 Answers

My 2003 xtype battery went dead and I had to replace it and now my ac doesn't work, blows only hot air and it was working fine before.


your computer needs to be reset.. go out turn the car on. turn the air all the way up as hot as the temp will go, let it run there long enough fro the heater to get hot... then turn it all the way down to the coolest temp and hit ac it will cool down.

Aug 25, 2009 | 2002 Jaguar X-Type

1 Answer

Ac not working on 2004 s430


If you have the hood up stand outside while someone activates your air off and on and see if the clutch on the compressor goes on and off while they activate the switch. If that isn't it the it could be improperly charged system or your climate control door that opens and closes for hot or air is not working properly and only stays on heat.

Jul 30, 2009 | 2000 Mercedes-Benz S-Class

1 Answer

2004 Mazda6 AC blowing warm air


too much freon is the same as not enough freon

Have an 04 mazda6 as well, AC seems to be the cars weakness. It takes 15-20 minutes till my car is ina driveable condition (Phoenix, AZ)

Take it in for a tune up, but I doubt the AC will be any better

Jun 19, 2009 | 2004 Mazda 6

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