2000 Mercedes-Benz SLK230 Q&A
2000 Mercedes-Benz SLK230 Question: Air Conditioning
Yes, if you just equalize both sides of the Climate Control. It should be explained in your owners manual. - dandd
Probably the AC control unit there is micro switch on both the hot and cold rollers may be one is broke ? this happened to me .. - Visitor
The problem is most likely the 'duo valve' which controls the flow of hot coolant to the driver/passenger side. these valves are actuated through solenoids. On mine, one of the solenoids had burned through resulting in exactly the same problem as you have (cold driver, hot passenger). The valve is found under the hood ahead of the electronics boxes (looks like two small metal cans), you can't really miss them. Pull the connector and check the following: measure the resistance over the connectors for each of the solenoids (measure between the center pin and each of the outer pins), if the resistance between either center pin / outer pin combination is not about 10-25 Ohm, the solenoid is bad. If these are good, turn on the car and measure the voltages in the connector (again between center pin and each of the outer). Do this with the temp control on max high and max low. In the one case you should see 0V, in the other more than 10V (can't remember if hot is 10V or cold is, but you will see the difference). If this is not the case, the controls are bad. Now for a bad solenoid, the easiest fix is to remove the solenoids by removing the 5 screws holding them in place and go to a breaker yard and get the solenoids of a C-class (Mercedes only sells the entire valve assembly and the ones for an SLK are really expensive while most C-class cars have exactly the same solenoids). If the checks above didn't work, it might even be simpler, take the entire valve assembly apart and clean it as the valves themselves get stuck every once in a while. - Visitor
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