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Old 11-17-2005, 03:40 PM
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Join Date: Aug 2005
Posts: 20
Stuck heat/AC fan buttons?

Yesterday, it turned cold here, quick. And for the first time, the climate control's auto/low/high buttons on my 300E's were uncooperative. I couldn't change it from low to auto without punching in each one a few times. Is this related to the cold, or my impatience ("heat Now, dammit!"), or are the switches or vacuum activators going down?

The fan buttons didn't feel sticky or gummed up, it's that they didn't want to "catch" when pushed. All 3 of them, which I never noticed before.

Update: Today, w/the fan buttons back to normal -I'm wondering if the fan buttonsare affected by cold if dirty?- now I'm only getting a small amount of air flow to the floor, even on high fan, at any Htg/cooling setting. Most air seems to be going to dash registers and windshield. Related?

Last edited by MustMakeAmends; 11-17-2005 at 07:08 PM.
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Old 11-17-2005, 05:02 PM
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Join Date: Jan 2001
Location: Santa Clara, CA
Posts: 445
Be careful if you spray "liquid stuff" such as tuner cleaner into the switches. One combination I used caused the plastic "buttons" to glue themselves together. Test on an inconspicuous area first! WD-40 might be o.k. - but test!
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