AC fuse blowing

Wobdog

Wobdog

a.k.a Mike
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My A/C fuse blows when I switch the A/C on high after a few minutes. AC does come on and blow cold air but after 2-3 minutes the fuse blows

Background:
The system was working normally before a recent 3-day, 500-mile drive. During the trip, I didn’t use the A/C compressor, but I did run the main blower on high with the fresh/cold air lever (right side) open.

Current issue:
Now, even with the main blower turned off and the cold air lever moved to the left, the A/C fuse blows soon after I engage the A/C. Ideas?
 
I have a blue 25 Amp fuse in fuse 8 location
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Mike
Yes original wiring and fuse block. Modern compressor. Do an AI search for 2800cs fuse diagram and the fuses are called out in E9coupe.
Dan
 
Sanden compressor can peak to 10 amps.
And the driver’s door window motor typically draws 10 to 15 amps during normal operation.
 
Last edited:
I'd suggest try to isolate the cause component. If no meter handy can install in line fuse to compressor clutch to see if that is offender. How is the front auxiliary fan wired? Along the way sometimes get added to the clutch load instead of through relay with separate power supply. Is heater fan - your "main blower" visibly shutting off when you turn on AC? Console AC switch alternates between fans - maybe that is shorting. Has your rear defroster popped on unknowingly?
Presume you meant standard 16 amp red not 10 amp
 
Sounds like a bad AC blower fan
disconnect the black wire at the compressor and turn AC fan to high.
 
the fuse sticker on my 2800cs shows what Dan's shows - 25a. Mike, since you have xxxx432 and Dan has x394 ... and i have x487 CSA ... they should all be the same. 25a is the correct answer. the 3.0cs also uses 25a on fuse 8 for A/C

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