dieseltech Posted June 4, 2007 Share Posted June 4, 2007 I have one for the International guys, 4700 with an ambulance package. A/C does not get cold, gets cool. This has vacuum operated water valves, I have International service manuals and there EVTM for the A/C system. There is nothing in the manuals about the water Valves. There is no power to the switching valve, when I apply power to it the water valves work and the temp drops another 12 degrees. Can any one tell me where the vacuum switch gets it's power? Thanks Quote Link to comment Share on other sites More sharing options...
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