Didn't see a "foam" hose. There was the large plastic one going into the heater core, a vacuum line with some foam around it where it crossed behind the heater core line and the bundle of green and red vacuum lines right on the bottom just behine the front lip of the glove box opening, but no "foam" hose. It sounded like it was cycling but it sounded like the compressor, not the switchover valves you spoke of.
It seemed to blow much colder today and not get warm between cycles like it did the other day.


Think of anything else I could look at????

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89 190E
2.6L
Arctic white
Grey leather
Sunroof
Pirelli P400 rubber
Smoked corners