2003 Aztek heater/fan problem

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ccbbyblue

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Started the car earlier this morning and turned on the heater(it worked as normal.) Drove to Walmart because I needed a few things. Turned off the heater and the car and went into the store. After about 20 minutes I returned to the car, turned it on and went to turn on the heater. To my amazement it didn't work. None of the fan levels went on! Absolutely NO HEAT or AIR coming out...:confused:

I checked some fuses inside the cabin and they all seemed fine. HELP PLEASE!!!
 
It's either the fan motor resistor or the fan motor or the fan switch.
 
does the blower motor work only on high ? If so bad blower resistor. If not check for power and ground at the blower motor , if good then a bad blower motor is the cause.
 
Try whacking the heater motor. If it starts, replace the motor. Not very scientific, but it works.
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I know this is an old thread, but if you're still having trouble, here is another idea...

I had the same situation on one of my cars recently.
Turned out to be the ignition switch.
The current for most circuits flows through the switch contacts; when you turn the car on and off, the current causes arcing on the ignition switch contacts. After several years of use, the contacts get all carboned up and cause all sorts of problems.

It could also be the blower resistor, but that usually causes a loss of some blower speeds, not all of them.
 
If the blower motor is bad and stalled, wouldn't it draw enough current to pop a fuse when power is put to it? I'm going with the resistor or ignition switch.
 
Could this tie in with Cooling Fans not Working?

I recently had the same issue.. if I hit a bump or railroad tracks my blowers will start working again and so will my cooling fans. For some reason either both work or neither of them. They're currently not working again (on any level) and I've replaced a couple of relays and fuses to try and hope for a simple fix to no avail. What would be the common denominator between these two systems?
 
The system grounds possibly. Many of the devices are turned on and off by breaking the grounds rather than the hot wire, allows for smaller relays due to a lack of arcing. Unfortunately, I can't find a schematic to narrow it down any further.
 
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