[xj] Warm air from vents

I’m getting hot air from my Windscreen vents in the upper dash. None of the
climate controls are turn on. The blower is not running. I think my Jag might
have the “Gardiner Mod” unless something else is causing it. It may have been
installed by a PO. But I don’t need warm air here in Mississippi now. How can
I turn this off or at least change the warm air to ambient air. I read the
archives about the Gardiner modification, but couldn’t gather much about how
to change the temp of the air coming in from hot to normal.

On a related note, I think my heater valve is stuck in the closed position.
The plunger is not extended downward. Could this be related to hot air from
the Windscreen defrost vents?

The archives and FAQ will answer many queries on the XJ series…
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