I have had a problem with my 85 325e running hot, but not overheating and not getting any heat inside the car. I thought it was the thermostat, so after replacing that, I checked the old one, I don't know exactly what temperature it opened at, but it did open. Niether hose going to or from the core is hot. Would backflushing the core be the next thing to try? I looked under the dash trim, and I can see the cable moving when I turn the hot/cold air dial, so it seems like that is not an issue either. All I know is it's getting colder here, and I have to get this figuered out soon.
Any thoughts, suggestions, input, or solutions would be greatly appreciated, thanks in advance.