Question about 1983 Jeep Cherokee

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80 cherokee defroster doesn't work

80 cherokee defroster doesn't work will not blow any air blower motor is ok

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It could be one of a couple of things. First, make sure all of the vacuum lines are good. The blower motor makes the air move, but its vacuum that sends it where you want it to go. The vacuum lines start at the control head and go to the different blend air doors. Either go under the dash, if you can access them that way, or remove the control head from the dash to inspect the lines. Make sure your engine vacuum lines are good also. If all that checks out, check the air duct tubes. They could very well be cracked and torn from many years of use.

Posted on Oct 07, 2009

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1 Answer

My heat is not working. It's not blowing out air. Nor is the defrost or a working it was making a ticking noise before it went out


Check your fuse for the blower motor and the wires going up to it. Also check connector to blower motor to make sure its not burnt. If all are ok replace blower motor

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you may have had something fall down into the defrost vent and it has worked its way down and is blocking the air flow thats trying to come out the vents,near the blower motor.also does it sound like the blower motor is spinning on high speed or at a lower speed,you could have a slow turning blower motor.

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there is only one fan and chances are the blower motor resestor is bad.

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1 Answer

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check your blower hoses to see if one or more have come loose or got redirected or the selector switch isn't functioning properly (is it blowing better on defrost as opposed to floor vents, or forward vents, etc.)
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Oct 26, 2010 | 2000 Jeep Grand Cherokee

1 Answer

Replaced the blower motor resistor, the air still blows through the defrost vents. Fuses are ok, what should I do next?


the blower motor resistor is for the speed of the blower not the direction of air flow you need to check the operation of the air flow direction control flaps

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have the blower motor resistor checked it may be bad causing air not to blow, you will get a little heat at defrost because heat rises and thats the high point, the blower motor is not working check that resistor.

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3 Answers

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check blower motor.. give it a tap when you start the vehicle and turn on the heat.. if it come on then you would have to replace the blower motor..if it does not check for fuse..

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1 Answer

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Either a bad blower motor or blower motor resistor. If the air is coming from the defroster only, check for a disconnected or broken vacuum line under the hood by the passenger firewall.

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