If its not working on some speed only, check the blower resistor. But If not working on all speed, possible open circuit with motor or the controller switch.
Have you checked your blower relay in the under-hood relay / fuse block? I found a photo that may help you identify which it is. If the other relays in the block are the same type (all markings the same), you can swap one out for it to see if that fixes it before moving in deeper.
SOURCE: 2002 F-150 blower motor stopped working.
There are 4 things to check out to pin point the problem: the switch it's self, the blower relay switch, resistor block, and the blower motor it's self. good luck
SOURCE: 1999 vw heater blower dont work
My daughter has a 99 Beetle GL and the A/C and fan went out. It's the A/C haeadunit that needed to be replaced. The switches short out and you have to replace the whole piece. VW charges about $225 for the part Hope that helps
SOURCE: I have a 2001 Chevy
Replace the blower motor resistor. Remove the shroud below glove box, 2 screws and a snap-pop fitting. Be careful of the courtesy light. Remove the blower moter and disconnect the purple/black power connector to it - - you'll need this extra room to work with. 2 more screws, same size, 6.5mm on mine, 7or 8mm on some others, that holds the blower motor resistor in place. This replacement part is less than 40 bones at most parts store. Unplug, replace, re-install, test and you're on your way with about 2 hours of slow paced effort in your own driveway. Typical cost at a garage - up to $400, what a sham.
SOURCE: My AC quit in my 2007 Nissan Versa. The fuses are
You have to remove the dash to get to the blower motor on this vehicle if memory serves me right. It's a substantial job. Take it to dealer should still be under warranty.
SOURCE: blower motor doesn't work and has no power to it
Check the blower multispeed control resistor pack is not faulty.
The resistor pack is usually located in the air ducting, in the blower fan airflow.
Basically, +12v power is supplied (via fuse) to the fan speed control switch, which then passes via the selected speed control resistor, to the fan motor. Often a interface relay is used to switch the blower motor high current.
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