2008 XK Convertible
As the weather here in Texas cools, the need for heat becomes apparent. The AC blows cold all summer long and that’s a blessing. Now I would like a little heat and I get just a little. The heat blows nicely on the passenger side, but the driver’s side is still blowing cold AC.
Any thoughts?

 

The X150 model is 20 years old, and almost every question has already been asked and answered. The easy way to find the answer is to use Google. Make sure your battery is fully charged and then look for Diagnostic Trouble Codes.

Previously asked and answered. See:
https://www.jaguarforums.com/forum/x...-vents-187862/

Stuart

 

Check your coolant level first and foremost (well first would be to provide diagnostic codes) Auto parts stores will read them at no charge but at high level but it's a start

Feel the inlet hose and outlet heater hose. Both should be hot. If one's hot and the other isn't, the core is blocked or you have an air lock (less likely)

When was your cabin filter last changed? change it.

Do a hard reset. It can sometimes reset the HVAC controls (not common but free and easy). Disconnect the battery cables from the battery (negative first) and hold the cables together (away from the battery for a minute). this discharges all the capacitors in the car. Reinstall cables (negative cable last) and check.

The more common problem is the blend door operating correctly. Drivers side might be stuck in A/C position.
Turn the car on and change the driver's side temperature setting from cold to hot and back repeatedly. Listen for a rapid clicking, tapping, or popping noise from behind the dashboard on the driver's side. This sound means broken gears in the actuator.
The actuators are located behind the dashboard, near the HVAC unit. Hard to access without removing some panels. Use a small mirror and you might see them moving as you raise and lower the temperature.

Good luck and remember to reply when you close this out for the benefit of other users.