Cabin getting hot with climate panel switched off

forty3

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Today I was driving with the windows open and the fansswitched off but noticed that the cabin was getting particularly hot.

When I took the key out of the dash it was also warm.

Not sure if this has any bearing on the issue but I did track the car yesterday although I can't be sure when the issue started as air is nice and cold with ac on.

Checked for fault codes but only codes are for infotainment.

Any ideas anyone?