climate control - PeachParts Mercedes-Benz Forum

emcdonald · #1 10-17-2005, 01:22 PM

Sorry if this was already asked , but how do yiou remove the climate control unit. fan has a mind of it5's own. It comes on only after messing with buttons on climate control unit. I checked the interior temperature sensor and the resistanance did correlate with the ambient temperature. Any help is appreciated. It is startting to get cold in the morninigs here in Phila. 83 300sd turbo 180k

meltedpanda · #2 10-17-2005, 01:52 PM

remove ashtray, you will see some small screws at the bottom of the wood panel. Remove these and pry forward, gently you will see how to get at pushbutton unit from there
Before you do that, are you getting any heat?
Can you jump start it by pushing defrost button
How many miles ?
Is your cabin intake working?
Can you get the fan going by thumping the bottom of it?

Your issue may not be in the PB unit. More details the better here, good luck

emcdonald · #3 10-17-2005, 09:28 PM

Thanks for the quick response. Yes I have heat when I play with the defrost button. I know what you mean by it's the only thing that you own.

meltedpanda · #4 10-18-2005, 09:39 AM

may be the temp interlock sensor. mine is located just in front of thermostat. this senses engine temp and tells ACC to come on when engine is up to temp. If this circuit is bad then the only way to get the ACC to work is by first starting it with the defrost button. Once started the ACC should function properly, all speeds, all modes. If this is not the case (full function after "jump start") then it could be fan or PB unit or temp regulator or fan regulator

emcdonald · #5 10-18-2005, 01:11 PM

I'll check temp interllock sensor.