86' 300E Heating Problems Continue

[merrim19]

Until about 2 weeks ago, my 300E was blowing very hot, ice melting air out of the vents. Now it's just blowing warm-ish air, only after the car has been running 5 or so minutes. The enigine temp seems to be holding normal even after 15 minute highway trips, so I'm assuming the coolent is doing it's job.

To correct the problem, I replaced the thermostat. I thought it may be stuck in an open possition. After a couple days of driving, this doesn't seem to have fixed anything. I've kept an eye on the cooloent levels, and that is still holding normal.

The next thing I would think about is the controller for the air conditioning. It's an arrow shaped part that electrically cuts off or releases coolant into the radiator. Since my AC doesn't work anyways, and this control has already failed on me, I took it out months ago. So now the coolent travels straight to the radiator regardless of the control panel settings.

Any advise of what I should look for next? Can the radiator be clogged or a fan not working? Winter in Michigan is not very comfortable in winter.

Thanks -Joe