My blower fan comes on and off, seemingly at random. I'm wondering if this has anything to do with the climate control system. Maybe a sensor somewhere has gone out of control and kicks the fan on whenever it wants. Anyway, I don't really know much about the climate control system to make an assesment, but that makes sense to me, so I wanted to run it by you guys.

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Gabriel
'91 350SD 162k
'83 300SD 210k - rear-ended and scrapped
'84 300SD 210k - totalled