Ac/heating fans stopped working all at once.
The relay center is under the hood, there should be several with the same #'s switch one that you know is working in place of the fan relay, if fans turn on replace relay. It is faster to turn on ac after switching relays for diagnostics as fan should run as long as ac is on...
Check fuses and relay switches.
Hope this helps
SOURCE: 2005 malibu - heat/ac has 4 levels for fsn, level
Your blower speed resistor has gone bad and needs to be replaced. You can pick one up at Auto Zone or Parts Source with the step by step instructions to getting the resistor replaced with common tools.
It is located under the glove box, way in the back of the passenger
foot area. You'll need to remove 2 screws with a 7mm socket, and remove
the plastic cover that covers the blower motor and another component
box that I think controls the passenger airbag. After removing the
plastic cover you'll need to side that passenger airbag module to the
right so it pop off its mounting bracket and move it out of the way.
That will give a better view of the blower motor. I highly recommend you
also remove the blower motor itself because the Blower Motor Resistor
is located behind it. I think you'll need a 5mm or 5.5mm socket to
remove the 3 screws that hold in place the blower motor and 2 more
screws for the Blower Motor Resistor... It's a cramped location to work
in but if you have all the tools and enough lighting then it shouldn't
take more than 30-60 minutes to do. The Blower Motor Resistor costs
about $19-$25. Good luck
SOURCE: ac and fan stop working
your pictur looks like ford The most likely culprit is the AC switch itself in the dashboard,
SOURCE: Bad Clutch Fan? Rear ac/heat don't work front only works on 4
The fan clutch isnt engaged at all times, therefore it may be normal to hold it in place (not recommended). On these trailblazer's 4.2L engine the fan clutch is electronically controlled. Usually when this vehicle's fan clutch malfunctions, there is a random ticking noise while idling or at a stop, also the "service engine soon" may turn on. As for the the fan speed problem, this may be a faulty blower resistor malf (typical) or climate control unit may be faulty. Hopefully this helps!!
Testimonial: "thanks..."
SOURCE: ac/heat fan does not work
Hello. your A/C relay is bad. It is under the dash to the right of the steering column. Replace it and you will be up and running. J.
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