Whilst driving with AC off but fan/blower on, I noticed some steam/ light mist with the appearance of smoke coming out the central air vents on the dash.
There was no smell to it and it wasn't smoke. It only lasted a few seconds. Does anyone know what this could be please? Thanks

 

Likely just water vapor. Nothing to worry about.

 

Hot? Humid? Normal. If you aren't losing coolant and there's no smell, no worries.

 

Why wouldn't you leave the A/C on all the time? It's "climate control" so will adjust to ambient conditions, and you won't risk the seals drying out through lack of lubrication. Auto mode is Jaguar's recommended normal operating mode.

 

Because it requires engine POWER to run it?

I'd rather have that power applied to the rear wheels!!!



That said, we usually only run our A/C when the controller in the passenger seat requests it...
Top-down motoring provides cooling breezes.