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Old 02-18-2013, 03:28 PM   #10
sprintguy
 
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Default Re: What to expect from the auxiliary heater?

O.K. old system... the aux heater with timer works with the vehicle off.. when the vehicle is running there should be another switch on the a/c heater control head in the middle of the a/c on and rest function switch. press that to keep the heater in booster mode. As for the coolant temp never rising over 110 degrees F , change the thermostat. To check the aux electric coolant pump start the van locate the pump (straight back from the egr valve, as a matter of fact the coolant feed to the EGR valve comes from the pump follow the hose back. on start up the pump should be on.

Good luck: Carl
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