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Ron Linville Posted on Mar 22, 2014

Blower control Have replaced the resistor and the 30amp fuse for the blower motor not working on any setting. After replacing the 30amp fuse the ac light and the defrost light now works,as well as the the ac compressor now engages. Clueless on why the blower still does not work. Need help

5 Related Answers

Anonymous

  • 36 Answers
  • Posted on Mar 11, 2009

SOURCE: 1998 Chrysler Sebring JXI Convertible Blower Motor Not Working

Sounds like it in the switch or the electrical plug at the switch.The electrical plug could be burnt and need repairing or replacing. Need to remove the dash fascia, Careful not to damage clips. If the cover has no visible screws or bolts, then it clips into place. Unbolt heater controls and pull contol forward. Not a fun job but with patience you should be ok.

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Anonymous

  • 710 Answers
  • Posted on Apr 22, 2009

SOURCE: ac blower won't work. Resistor has been replaced 3 times. I think it is the problem now. Is it easy to replace? Where is it?

Blower motor resistors are found on the pasenger side ducts near the blower motor. It should have three wires going to it.

Anonymous

  • 37 Answers
  • Posted on May 26, 2009

SOURCE: Blower motor vent selection switch not working

the hvac selector switch in the dash may be the problem.You need to remove the switch and look at the connector on the back of switch,see if there are any burnt wires at the connector or switch.It's all electronic and the switches have been known to burn out on this and other model.

Anonymous

  • 9 Answers
  • Posted on Mar 27, 2010

SOURCE: 1997 Jeep Cherokee - Blower motor stopped working.

Check the relevant fuses with a test-light or VOM, don't just "eyeball" them as they often break at the very end. Then check the heater/A/C relays on the electrical panel. The heat/cool is controlled by a stepper motor which opens and closes the air "mixing box", but it won't work with a bad relay. If all of those check-out, you need a OBDII code reader to check the "engine" computer, as it controls the electrical modules. Also check the fusable links going to the electrical panel, and the cable from the battery to the panel. The cable may be corroded in-two and you'll never see it, so no juice to the panel, no juice to the heat/AC system. (I had a Dakota do that.) PS: Double check the grounds that they aren't corroded. Learned about that from a BSA Gold Star production racer.....

Testimonial: "Many thanks, Walker. Tt was the fuse in the kick panel. Looked ok, but NO continuity. I used the 10A spare and everything worked. Thanks!"

Anonymous

  • 1 Answer
  • Posted on Jul 16, 2010

SOURCE: The ac quit working...no fan, no air. The 30amp

check the ac blower transistor under passenger side of dash behind the blower motor. on my 2003 compressor would not cut on , front blower only operated on high an blew hot air, rear blew on all speed but only hot air. $58.00 at dealer plus tax. 15 minute fix. there is a video on youtube that documents the process. just fixed today

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2001 Silverado 1500...AC Blower Motor not coming on at any speed. Checked all fuses, all good. Motor tested good, so I replaced resistor and harness, did not help any. Whats next? SOLVED !

What's next? Auto repair shop. lol You check all the fuses ? How looking at them ? Did you check for battery voltage across the fuses using a voltmeter ? Did you look at a wiring diagram to see what all is involve in making the blower motor work. Just replacing parts is not how to fix the problem.

TechConnect Ep.37 - How To Test A Chevy Blower Motor Resistor (DR775) - YouTube
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HEATER NOT WORKING ON 03 YUKON

Heater not working ???? Blower motor not working , no air blowing out of the vent's. defrost , floor ? I'm assuming you have the manual HVAC - climate control system , by the fact that you replaced the resistor assembly . Was there a relay included on the resistor assembly ? What fuse's did you replace ? HTR/AC - 30 amp. left I/P fuse box , BLOWER fuse -40 amp - under hood fuse box ? Did you use a DMM - digital multi-meter an test for B+ voltage at the purple wire at the blower motor ? The fuse's you replaced ,check for B+ voltage with meter .
Your vehicle could have two different HVAC systems , manual & automatic. The automatic system doesn't have a resistor assembly , has a blower motor control processor. Do you know how to test automotive electrical circuit's ?
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02 sunfire

If the 30amp blower fuse has power, and you can run power to the blower motor and it runs, I would say its the blower relay or the control switch on the dash. The control switch provides power to turn the blower relay on. The fan switch provides the ground circuit.
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2004 Chevy Silverado 2500HD ac stopped blowing we changed motor and resistor and still nothing we have cold air running when u drive down road but no pressure

I'm going to assume you have the manual control version. The relay in the resistor allows the fan to run on high and bypass the resistor circuits. There is a 40amp blower fuse for high speed and a 30amp fuse for the other speeds. The motor is grounded thru the resistor.
Do you have power and ground at the motor on any of the settings ? ?
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Blower motor

I'm showing a blower relay and a resistor used on models with manual ac control.
The blower motor is grounded and the fan switch provides power thru the resistor. So you have a 40amp blower fuse that handles high thru the relay, then a 30amp HVAC fuse that powers the blower thru the fan switch.
Do you not have power from the resistor to the blower motor on the purple wire ?
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According to the wiring diagram, there are only three components to the system. The blower motor, the resistor, and the speed control switch.
The resistor gets power from the switch which is powered by a 25amp fuse. On high setting the resistor is bypassed and the blower motor gets power from a 30amp circuit breaker. The blower is grounded to the body. The fuse is hot in the "run" position and the 30amp breaker is hot all the time.
So you should have power at the blower motor on one of the settings and a direct ground on the black wire.
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The fan motor switch in my 1990 dodge dakota does not work. I have checked the blower motor out and the fuses out. and the resistor out. they all are fine. I am not getting any juice to the fuse box for...

Have you checked the blower motor resistor. Usually locate in the blower box with a plug on it. Has 2 bolts holding it in. Take out and inspect.
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My AC was first only working at the max setting now not at all

go for the reostat which is all in one with the blower motor ,expensive part though
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No heat and the defrost is the only place air will come out. Some time ago in the spring the a/c would not work then it started working but now the heat does not, and you get no get air flow from the vent...

Check fuse for blower motor, it is a 30amp fuse behind the plastic panel that is to the left of steering wheel, you must open the driver door, open up the fuse panel, I believe the 30amp is the only 30amp fuse in there, If it is blown replace it, then try the heat again. If nothing or fuse blows again, check the blower motor resistor. This is located under the glove compartment. Do a search on google if that is the case, I was able tofind a solution by putting in "blower motor resistor" ended up buying one for @ 30$.
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