The wife came home yesterday and said dhe does no have any heat. Coolant levels are good, does anyone have info on how the thermo control unit works? Thanks Jim

 

You can check climate fault codes from the front panel. See attachment.

Also check the coolant pump fuse, #15 in the engine compartment fusebox.

While you are in the fusebox, make sure none of the relays have worked loose from their sockets.

After a period of non-use, the most likely cause is a stuck heater valve, or possibly a bad coolant pump.

 

Thanks, went for a drive and decided to blow some of the carbon out of her and lower and behold the heat came on! thanks for your help. Jim

 

Do you still get heat at low revs?
If not it is likely to be the heater pump.
At high revs you can sometimes get heat with the pump failed.

 

The pump maybe the problem. Up at the cabin chancing a bambi, but i will check when I get home. You don't have any specs on the location of the pump. One of my goals was to replace the remains hose this fall. 12 years old little preventive maintetance. Thanks Jim

 

Try this link to previous discussion
https://www.jaguarforums.com/forum/x...ng-well-66815/