Question about 2002 Jeep Liberty

2 Answers

Low speed heater & defroster motor not working but high speed does

Looking for blown fuse

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  • Jeep Master
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All older cars do this, the heater speed dropping reistor is blown
a cheap part.
it can only be 3 things, and a $10 voltmeter tells you which it is in 5min work

  1. bad switch 0v out
  2. bad resistor 12v in, 0v out.
  3. or bad wiring. (0v out)

the drawings are on alldata.com

but on all cars.
bad power to HVAC
bad controls (includes resistor block or new car modulators)
bad blower motor. (fails on high)
or bad damper if only some modes fail to blow.
and wires, it not necessary to say that "wires" ,its global to all electrics and electronics, it's a GIVEN.

im looking yours up now. to be accurate.
and it does have the block.
see red arrow that resistor is blown up.



low speed heater & defroster motor not wor - 25320464-dukuhvq0l2ihjxmoa1t32awe-3-0.jpg

Posted on Dec 14, 2014

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  • Expert
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I had same problem with a cadillac and it turned out to be the Hi-Lo Switch. Replaced that and no more problems . Not sure if this would apply to other vehicles but who knows Its worth checking.

Posted on Dec 13, 2014

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-------
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