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Old 11-20-2010, 08:10 PM
PanzerSD's Avatar
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Join Date: Jan 2006
Location: Saskatchewan Canada
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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?
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Old 01-11-2011, 02:01 PM
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Location: Palm Springs, CA.
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Quote:
Originally Posted by PanzerSD View Post
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
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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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Old 01-11-2011, 06:56 PM
Doktor Bert's Avatar
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Check your e-mail.....
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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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