The heater in my 1993 mercedes 190e won't shut off, its hot all the time and I want to know if its the climate control module?

Anonymous Aug 29, 2008

I think iits the module cause the heater is stuck in the defrost mode and no matter which button I PRESS it blasts hot air out the defrost. How do you self test the control module?

Also, of course there is no AC either. We are driving across the Mojave Desert tonight without AC, I bought a piece of heater hose to bypass the heater core for this trip!

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Marvin

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Posted on Aug 29, 2008

Marvin

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It is either the climate control module or the AC Heater temperature. control door motor. The module has self test capabilities, have a self test run on it before you start replacing parts.

Marvin Aug 30, 2008

I am not familiar with your model as far as the self test goes.

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