Jaguar Repair Questions? Ask a Mechanic for Answers ASAP
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Based on your description you have a partially stuck heater control valve. This is the only component that controls the heat. There is no temp actuator. Locate the valve and disconnect it to see if the heat starts to work. If it does then it is an electrical problem with the control module or wiring. If it stays cold then it is usually a mechanical problem with the valve.