No Interior Fan and No Snow Flake - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Tomikaze · 07-15-2018, 07:17 AM

Switched out the engine fan relay with the a/c relay AND IT WORKED!!!! So happy right now.

MWS · 07-15-2018, 01:22 PM

Quote:

Originally Posted by Tomikaze

Switched out the engine fan relay with the a/c relay AND IT WORKED!!!! So happy right now.

Good thinking...and something I wouldn't have thought of until I was about 8 hours into stabbing around with my multimeter.

WindS · 09-29-2018, 04:37 PM

I've got the same issue where the blower fan doesn't work. I tested the fuses and swapped the relays. No difference.

I got to the fan and tested the voltage on the 2 leads to the fan = 12V. So the fan has to be toast right? So I install a new cheap fan and it doesn't work either. I confirm 12V.

I did a few more measurements. I get 12V at the 2 terminals and a 1000-ohm resistance. I've got no idea about the resistor value. 1K-ohm seems like it's likely in there to prevent the fan from going.

Logic says the new fan is bad too. I don't have a 12V power supply to test the old one. Can there there be something else wrong. Is this too much resistance. The fan should be getting 0.012Amps. Not enough?

Thanks.