[diesel_mercedes] Voltage to monovalve - how does it work?

 

I replaced my monovalve, nothing obviously wrong with the one I took out. Checked the voltage to monovalve using different settings, it gets full battery power (13.x volts) on max cold in a/c and economy settings, and virtually no power anywhere else. I did notice some 6 - 7 volt readings in the center temp settings when I first started the car up but after it warmed up it would only send voltage on max cold setting. It was not sending voltage even when set to the coldest setting just before the max detent. I don't know if there is a delay or what. Anyone know how the voltage to the monovalves is supposed to work?

Thanks,

Jim

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