Dash Fan not working

[wilsonsk1966]

I know this is a very common story, but here is where I am at.

The doors are all working.

The back system works.

The fan does not blow at all anymore. I used to be able to get it to start by messing with the speed control on the main controller, changing speeds rapidly, now nothing.

Looking for advice on how to determine if it is the main controller or the fan speed control.

Thanks,
Steve

 

[stamp11127]

Year of vehicle and auto or manual ac controls might help getting the ball rolling.

 

[wilsonsk1966]

Oops, sorry.

2000 Eddie Bauer Expedition
EATC

 

[stamp11127]

With EATC issues it is best to run the eatc diagnostic routine. There should be youtube videos showing the procedure. Once that is complete and no codes present check the blower motor connector for power. If no power usually it is the blower control module. Before replacing the module you can also check for power coming out of it at the connector. If you have power there then it is a harness issue.

I added your vehicle info to your profile signature.

 

[wilsonsk1966]

Found the diagnostic procedure, I get "888" and all other display functions lit up, suggesting the EATC is ok. I'll start checking down by the blower and blower control, thanks!

Steve