Constant Heat...Can't take it anymore! - Mercedes-Benz Forum

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post #1 of 2 (permalink) Old 03-10-2004, 09:27 PM Thread Starter
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Date registered: Jan 2004
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Constant Heat...Can't take it anymore!

Have 1984 300 sd which I recently purchased for $900...Previous owner said a/c went buggy and her father "rigged" it so at least she would have heat.

I know that if the monovalve is bad, it will default to all heat all the time. But I live in Austin Texas and DON'T NEED THE HEAT!!!

Need to take a small 200 mile round trip tomorrow with the wife and kids who will complain about having the sunroof open and the windows all the way down.

Any way to disable the heat?

Thank You,
Sweating in Austin

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post #2 of 2 (permalink) Old 03-12-2004, 09:01 AM
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Date registered: Aug 2003
Vehicle: 95 E300D
Location: Cambridge - UK
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RE: Constant Heat...Can't take it anymore!

I had to do it once during an episode with an a/c problem.

One way is to clamp the rubber pipe going into the monovalve, in effect stopping the circulation of hot water . i cant remember how I did it but using some small clamp or tool - use your imagination with whatevers lying in your tool box or make something out of a couple of bits of wood and a hinge. This sounds a crummy idea but it did work as a temp measure to get the wife back under control (had the same pressure)



95 E300D Wagon 170k miles
ex - 94 SL320 58k miles
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