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-   -   fuse #3 & #9 W116 (http://www.peachparts.com/shopforum/tech-help/288799-fuse-3-9-w116.html)

PanzerSD 11-20-2010 08:10 PM
fuse #3 & #9 W116
 
I just blew these two fuses and my heater quit, replaced, works fine. They blew after a cold start. didn't notice till I got back in car, fan was working fine when I started the car...imminent heater fan failure?

Doktor Bert 01-11-2011 02:01 PM
Quote:
Originally Posted by PanzerSD (Post 2591675)
I just blew these two fuses and my heater quit, replaced, works fine. They blew after a cold start. didn't notice till I got back in car, fan was working fine when I started the car...imminent heater fan failure?
The #1 cause of this type of failure #3 & #9 fuse on W116) is a shorted A/C low pressure cutoff switch on the drier. It will short even if the A/C system is discharged AND the compressor clutch is unhooked.

Unhook the two wires at the A/C low pressure switch on the drier and retest....Robert

Doktor Bert 01-11-2011 06:56 PM
Check your e-mail.....


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