Quote:
Originally Posted by PanzerSD
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?
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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
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 Did you just pass my 740 at 200 kmh in a 300SD?????
1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013
100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership 
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