1994 dodge ram 1500 blower diverter swithes to defrost upon acceleration why?

Asked by Jul 08, 2010 at 10:05 PM about the 1994 Dodge Ram 1500

Question type: Maintenance & Repair

my ac diverter will switch from vents to defrost upon acceleration and switch back when you let off the gas. why?

2 Answers

115

bad check valve under the hood that supplies vacuum to the interior of the vehicle.

3 out of 3 people think this is helpful.
715

check for vacum leak between the engine and firewall on the truck or at or around the reserve tank

1 out of 1 people think this is helpful.

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