Question about 2005 Jeep Wrangler

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HEATER WONT BLOW THREW VENTS ONLY BLOWS THREW DEFOGGERS

JUST FIXED HEATER BLOWER AND GOT A NEW RADDITOR AND STILL WONT BLOW THREW VENTS

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  • tink1473 Nov 24, 2008

    why wont the heater blow on high only on low

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Is it blowing threw the defroster if it is open the hood look on the left hand side of the fire wall there is a vacuum line there if it is broke blower will only come through defrosters if you have a vac canister it looks like a ball make sure the vacuum lines are good on it

Posted on Nov 23, 2008

  • you should check the blower resister it has high- med -low its probley burnt up take it out and look at it it is on the passenger side where your feet go

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1 Answer

My heater only works some of the time and my rear defrost dont work what could be the problem


As by heat only works some of the time , you mean it doesn't blow air out of the vent's . This means you probably have a problem with the blower motor or blower motor resistor or blower motor relay .
Rear Window Defogger Inoperative

    Exchange the rear defogger relay with a known good relay from the under hood junction block.
  1. Turn the ignition switch to the ON position.
  2. Press the rear defogger switch to the ON position.
Does the rear defogger grid warm?
--
Yes Go to Step 2
NO Go to Step 3

2

Replace the faulty relay.
Is the repair complete?
Go to Defogger System Check --

3

  1. Use a fused jumper wire in order to backprobe between terminal A4 of underhood junction block connector C3 and ground.
  2. Use a test lamp in order to backprobe between terminal C5 of underhood junction block connector C3 and ground.
Does the test lamp light?
--
Go to Step 4
Go to Step 23

4

  1. Use a test lamp in order to backprobe between terminal C5 of underhood junction block connector C3 and ground.
  2. Press the rear defogger switch to the ON position.
Does the test lamp light?
--
Go to Step 5
Go to Step 14



Mar 23, 2016 | 1999 Oldsmobile Alero

1 Answer

I have a 91 camaro I fix my a/c but now it won't blow threw the vents only threw the dash


???the vents are in the dash . yes??? are you asking the ac to blow out on the floor , as typically they don't do that , only the heater does that

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2002 Jeep Sport - heater and defogger not working


no air blowing check fuses and blower for being bad ,if the air does not blow out the top but only coming out the dash vents like the ac does check for broken cable on the controller in the dash and also cable behind glove box whichg moves the doors inside the air box

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need to make sure you have enough coolant and if it does then it could be your thermostate or clogged heater core

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I'd have to say it's the blower motor. Does it blow hot air when the heater is on?

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Front defogger blows out heater vent when set on DEF. All of the heater, a/c, settings work properly. One day, I turned on the DEF and the warm air blows out of the heater vents, not the defroster area. I...


Sounds like the flap valve in your vent system that allows air to go to the defrosters is either jammed or broken. Unfortunately you will have to take the vent system apart to look.

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A/c blower issue. 2202 chevy trailblazer


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Sometimes the heat blows hot than blows cold


Try pulling trouble codes first. Run your car at idle with the blower control set at anything but off, the temperature in full cool and the right knob in defrost mode. Push the rear window defogger button until the instrument panel reads AC00. The BCM will chime and the A/C button will blink. Release the defogger button and wait until the A/C button stops blinking. The trouble codes will show up on the odometer. There isn't a vacuum hookup that I know about as these are electrical. Anyway, write down the codes and call a dealer or buy a service manual to interpret them.

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