My truck uses 02 pete orfice for cab and expansion for bunk.i was talking to the mechanic at the dealer and says the ac pump will seldom shut off in this hot weather.the problem with my fan cycling on for long periods of time 15 minutes then shutting off for 5 minutes ending up being my cat coolant temp switch.it was sending eratic voltage to ecm telling it kick on fan,even thow it wasnt running over 190(mechanical guage).just letting u know the result of my problems.thanks for all the replys.p.s it wasnt throwing a check engine light either the voltage wasnt high enough to throw a code.
why wont my ac pump shut off??
Discussion in 'Trucks [ Eighteen Wheelers ]' started by Ryanr, Jul 16, 2012.
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