PeachParts Mercedes-Benz Forum - Sluggish Heater Control-95 E420

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Tom Pawlik

12-19-2000 09:04 PM

I just bought a 95 E420. In the auto position the temperature wheel does not change the temperature quickly like my old M-B and when the wheel says 65 degrees, hot air is still blowing. Cold air will not blow without moving the wheel to the coldest setting. Is it the monovalve or the pushbutton unit?

Benzmac

12-19-2000 09:36 PM

It might not be either one. You may have a problem with the aspirator or the inside temp sensor.

I would have it checked.

mbdoc

12-20-2000 06:27 PM

Or if the mono heater starts to hydro-lock, due to bad diaphram.

robaincltnc

12-26-2000 11:51 PM

Mr. Moderator,
I have the same problem with my 86 560sl. Is this the same as the aformentioned problem with the e420? The guage seems like it is heating only when on max.

robaincltnc

05-28-2003 10:37 PM

MB Doc?

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