New owner tip, the 940 heater valve sticks

Just discovered this the hard way. The heater valve on my 940 was stuck open so I had hot air blowing even with the climate control set to cold. The mechanic said it's super common on these. He freed it up with some penetrating oil but said I should replace it before next summer. Apparently the part is only about $40. Wish someone had told me to check this when I bought it!