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Matt, Engineer
Category: Jaguar
Satisfied Customers: 387
Experience:  Mechanical Engineer with 20 years experience in the auto industry, 8 yrs in formula 1 engine testing
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2001 S-Type AC has been serviced and checked ; the air is

Customer Question

2001 S-Type AC has been serviced and checked for leaks; the air is not getting cold and the air vents will not redirect the air from the dash vents to both under dash and dash vents; now the red indicator light does not come on when the AC button or the air recirculating button is pushed. How big a job it to get to the air duct flaps and operating mechanism. Thanks WG
Submitted: 1 year ago.
Category: Jaguar
Expert:  Juan Crespo replied 1 year ago.

Hi there. Welcome to our site.

To save time and effort diagnosing and repairing the symptoms you describe, it would be best if the work was performed by a qualified technician using a dedicated scan tool. The system consists of many electronic controls, sensors and actuators that are very expensive and delicate and can easily be damaged by non-experienced hands.

Having said all that, there are two ways to go about diagnosing the system; one is using a capable scan tool, the other way is to check individual signal values with either a high-end multimeter capable of reading frequency (Hz), or a lab scope - I can help you with either or all. How would you like to proceed?