SeaFuse
Member
Hello folks. For Auto Temp 2 systems, what does it mean when fog / steam comes from the defroster vents? This happends mostly when it is very wet out (Seattle), after the engine gets warm. On dry days does happen much. System seems to work normal - does not blow hot air when in off position. Other positions and blower speeds system respond OK. A/c does not blow cold due to freon level. When heater is on there is less fog but when defogger is on there is quite a bit. The fog / steam is odorless and does not leave a film on the windshield so I do not think it is coolant. I though it was due to a bunch of leaves being packed in the cowl well below the windshield wipers but cleaned this out and still does it. Do not see any signs of moisture around heater core area but is hard to tell. The fog looks almost like dry ice smoke from a rock comcert. thanks.
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