Friends at the BB,
This morning is the first time this Autumn that I've needed to use the heater on my '91 240 sedan, and it appears to not be working - the fan was only blowing cool air, even after driving for at least 15 minutes. When the heater core went out on my 740 some years ago, it made an oily mess under the front driver's side floor mat. Nothing like that is happening with the 240. I'm hoping that there's any easier answer than replacing the heater core.
Many thanks for your consideration.
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