dimmer

My 1988 S4 has developed an overheating problem. The gage had been creeping towards the upper white line at times, but today it went over. Couple of years ago I had replaced all 4 temperature sensors and the thermastat ... so I don't think it's any of those. I know that the fans work because when I turn off the car, they come on momentarily. However, when hot and run in the driveway, they are off (I did push in the hood-open switch. Any ideas where to look? Can I rig the fans to run when the engine is on as a temporary measure to get by for a bit?

Any advice is always appreciated.

Dimmer

Jim bailey - 928 International

Check the hood switch perhaps it has failed.

TheoJ

I had the power stage fail sometime ago. The finned box on the very front of the car. I replaced FETS of the power stage and it ran fine ever after. The other option besides what Jim said, is a faulty controller. It resides next to the pass. seat. Sometime is is as simpel as a loose connector. Check if the fans run when AC button pushed...
regards,
Theo

dimmer

Thanks Jim and TheoJ for your feedback. I checked all your suggestions and found some corrosion on one of the connectors to the control box next to the passenger seat. Cleaned it up and just took it for a test spin ... the gage didn't budge much from the centre position.

I love the 928 community!!

TheoJ

Glad to be able to help. Yes: nice community, those 928 owners.
regards,
Theo