Question about Dodge Grand Caravan

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I can get heat and defrost from floor vents and the defrost area but the button that is supposed to do everything at onc gives me heat everywhere but the vents

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  • Dodge Expert
  • 652 Answers

Vent doors in hvac probly not working

Posted on Nov 14, 2013

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6 Suggested Answers

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Posted on Jan 02, 2017

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junkman1249
  • 552 Answers

SOURCE: heat only blows out of dash vents, will not blow out of defroster

vvacum leak. in back of your temp control unit there is a series of vaum lines attached together they might even be in different colors these lines go to the vent and they open and close them when you slide the lever over this piece needs to be replaced

Posted on Dec 05, 2008

  • 124 Answers

SOURCE: heater control 98 chevy s10 blazer

These trucks have a problem where moisture builds up in the heater box then freezes. When this freezes and you change your heater settings it breaks the shaft for the blend door. If this is what happened you should be able to look under the dash above and to the right of the gas pedal and you will see two vaccuum accuators one of them you should be able to wiggle around the linkage if it is broke. To fix this you need to remove the entire dash to get the heater box out which involves discharging the AC and draining the coolant because the heater core and evaporator come out. Please rate.

Posted on Dec 13, 2008

  • 37 Answers

SOURCE: PROBLEM WHEN SELECTING THE DIRECTION FOR THE AIR

Sounds like you have a supply vacuum problem. When you lose supply vacuum to the control head it defaults to defrost.

Posted on Mar 13, 2009

  • 323 Answers

SOURCE: heating / air conditioning control stuck to front defrost vents

There is a vacuum leak under the hood. Find the vacuum line on the passenger side where it comes through the firewall and follow it to the engine. You system needs vacuum to operate and without it the default setting is on defrost for safety reasons.

Posted on Jun 19, 2009

  • 3 Answers

SOURCE: Heat wont blow through heater or defroster vents

Had the same problem. believe it or not i changed the gas cap and got heat all around. something about pressure.

Posted on Dec 07, 2011

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it all has to do with vacums basically, when you turn the switch to defrost there is a hose that should **** a "door" so to speak over lettin the air travel through your defrost vents, and if your not gettin suction the in aint gonna switch over, and are you gettin it out of the floor vents?

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