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  #1  
Old 04-16-2004, 11:31 AM
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Join Date: Jan 2004
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Climate Control 260E

I do not have a climate control unit in my car right now (part 124 830 08 85). By default it blows a hot air on the windshield keeping really hot temperature inside of the car like in a sauna :-) especially on the high speed driving.
Is it possible to turn it off for the while before I install a new climate control unit?
Thx.

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1987 MB260E 187K
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  #2  
Old 04-16-2004, 12:12 PM
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Location: Montreal, Quebec
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I would guess not having a climate control module in place defaults the mono valve to full open.
I am not sure if disconnecting the mono valve wires would close it. You may try it.
For the fan, you could always remove the fuse
JackD
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Old 04-16-2004, 12:40 PM
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What is heating the air? Isn't some electrical heater? Or it is a heat from the engine? If I remove the fuse can the "heating element" burn out? Another problem that this fuse control not only the fan but something vital too I do not remember now exactly what.

Why the speed of the car affects the intensity of the heater blow and the temperature increase?
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Old 04-16-2004, 01:10 PM
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There is no electrical element to heat the air. Air is heated by going through the heater core, in which the engine coolant circulates. There is more heat at higher speed because there is more hot water circulating in the heater core and more air going through the outside air intake.
To temporarily stop/reduce your problem:
a) you need to stop the climate control fan from working. There is a 30amp. flat metal strip fuse located outside the main fuse box in a plastic enclosure. Remore the fuse. This fuse only controls the climate control fan.
b) Stop the hot coolant water from circulating through the heater core by closing the mono valve.
JackD
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  #5  
Old 04-20-2004, 12:26 PM
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I removed the fan fuse. It does reduce a hot air blow inside the car but a hot air still comes in on the high speed with annoying whistling.
Is it possible to reverse a fan blow from inside to outside?
As I understand the mono valve controls the flow of the coolant to the heater core and it is electrical powered. And it is no mechanical valve, which I could close by hand to stop the coolant flow to the core.
Maybe I can short some contacts on the climate control unit connectors to close the mono valve?

Where is the mono valve located? How can access its wires to disconnect?

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