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Message: <blockquote data-quote="Rotaxxx" data-source="post: 86750" data-attributes="member: 11791"><p>Trying to get the a/c to work on my s250 but ran into a bit of a problem. First of all it would blow hot air no matter if the temp knob was on cold or hot. Did a little research and found out there is a electronic valve on a heater hose that opens and closes with the temp knob. So I find said valve and find out that theres three wires that run to it. a 12v positive, negative and a signal wire. Well the white wire (signal wire) going into the actuator was broke off before the connector. Got that fixed, and it still blows hot air when the temp switch is set to cold. So I test the temp switch, there is 12v+ at it and 12v- and the signal wire to adjust the temp. They all seem to work properly behind the switch, but at the actuator the there is no power at the white wire which controlls the valve. Anybody have any ideas were to look next? Any help would be greatly appreciated!</p></blockquote><p></p>