my heater control won't switch from defrost to vents 1999 dodge dakota
80

Asked by Cutter510 Jun 25, 2022 at 11:05 AM about the 1999 Dodge Dakota Sport Club Cab 4WD

Question type: Maintenance & Repair

when air is on it only blows from defrost vents and in floor won't switch will
change sometime when going slow down hill changes back when speeding up
again

1 Answer
155,365

james answered about a year ago

You have a vacuum leak in the climate control system. When the system loses vacuum it defaults to defrost for safety reasons. Check in the engine compartment for a broken, cracked, or disconnected vacuum hose. Hope that helps! Jim

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