HVAC fan switch

[jcsmith]

My fan switch stopped working. It was intermittent at first. A few times with the AC on I turned the fan off and theAC light stayed on. Does anyone have any suggestions to diagnose this issue. I appreciate any info.

 

[Oliver Closehauf]

First thing would be to do a continuity check of the switches. Remove the radio bezel to get to the screws that hold the switch block in place, use a multimeter set to Ohms to check if the switches are closing or staying open. Check your connectors for corrosion when you have them apart.

 

[jcsmith]

I appreciate the response. I will give it try.

Chris

 

[HemiLonestar]

Is it the switch or the resistor?

 

[jcsmith]

The switch was working on all speeds so I assume the resistor was good, but electrics are not my forte

 

[jcsmith]

Update; turned out to be the ignition switch on the left of steering column. Not the key tumbler. The contacts get hot and burned raising the resistance , and losing contact.This might help someone in the future. I was able to remove the shroud around the column and wiggle the switch , which got the fan working again while I waited for the new switch to come in.