fan speed switch problem

[stevengould46]

My Fan speed selector switch works on high only. Any other posotion is 'off'. I've replaced the switch, no change. Broken wire? Where to check next?

 

[rwenzing]

The most common cause is a failed blower resistor block next to the blower motor in the HVAC plenum. A replacement block costs about $12~18.

 

[stevengould46]

fan switch etc

Thanks, Bob. Where is the HVAC plenum located?

 

[askikr79]

It's under your hood, passenger side on the firewall. I would take a picture but my camera crapped out.

 

[rwenzing]

Here's a picture I "borrowed" from another post. You can see the connector for the resistor right next to the blower motor.