A/C-Heater Fan not working

[langg]

2001 996 C4 Coupe - The fan has just stopped working. No a/c, not defrost, no heat. I checked the D6 30 amp. fuse and it is ok. The fan runs on 12v supplied at the plug socket on the fan. I replaced the resister. What else can it be? The CCU seems to be woking. The lights light up and the fan speed indicator moves up and down with the +/- buttons. How can I test the CCU?

 

Thanks.

 

Lang G

[Loren]

Have you seen any foam bits come of the vents?

A common issue (as these cars age) is the insulation decaying and breaking up - it can even jam the fan.

 

Do you have Durametric to test the circuit and look for faults?

[langg]

I have seen foam bits but I had the fan out and it turns freely. I do not have a Durametric (yet). Would the Dealer's system be able to detect a problem with the CCU? What can the Durametric detect?

 

Lang

[Loren]

Yes, a dealer tool (like PST2 or PIWIS) can test circuit readiness and switch positions.

 

Durametric can not do as much. A list for your car is here: http://www.durametric.com/modelfeaturematrixv6.aspx#996