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Richard, Jaguar Technician
Category: Jaguar
Satisfied Customers: 15510
Experience:  12 years at a Ford/Lincoln Mercury and Jaguar dealer as technician and shop foreman.
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2008 jaguar. ac compressor changed out along with the

Customer Question

2008 jaguar. ac compressor changed out along with the condenser and filter/drier. still not blowing cold. when i first purchased the vehicle about 1.5 years ago on the way back from florida the ac worked great then all of a sudden only warm air blow out the defrost, but when i was about 100 miles from atlanta the ac blow out the dash vents and was very cold. ??
Submitted: 1 year ago.
Category: Jaguar
Expert:  Richard replied 1 year ago.

First need to check the air conditioning pressures are to make sure they are ok. If so then we most likely have a problem with the heater valve. We can perform a test with a digital multimeter. Go to the left side dash and remove the side panel. You will see some connectors. We are looking for the green connector. Use a light and you will see each wire pin numbered. You are looking for the 14 way green connector. Make sure the key is off and disconnect it. With a voltmeter check for power on pins 9 (brown/green) and pin 10 (brown/white) on the harness side you disconnected. If power is present then leave the black lead of your meter to ground, reconnect that harness connector to the dash then start the engine and turn the climate control to full a/c. You should read low voltage on both pins and you should see it change as you increase/decrease the temp on both pins. If the voltage stays high you have a bad module and the valve is mist likely shorted.