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#1
08-11-2006, 11:52 PM
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a/c melts fuse only on auto/high speed fan
1st-My 1992 300d melted the 30a fuse.Driving along and just went out.The a/c was on and the fan setting was set to Auto.I wired in a 30a auto reset breaker and the system performs fine on low speed without tripping the breaker.However, if I set the fan to auto/high it will trip within 3 minutes.
2nd The a/c still cools well set at 65 but will not cool if control temp is set above 68-70 Has anyone had either of these problems. Any help is appreciated. Thanks Gregg 
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#2
08-11-2006, 11:55 PM
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Check the amp's draw. On high, you'll find that draw is very close to fuse rating.
Bearing begining to sieze and/or brushes worn. Sounds like new blower fan needed.
__________________
[http://languageandgrammar.com/2008/01/14/youve-got-problems-not-issues/ ] "A liberal is someone who feels they owe a great debt to their fellow man, which debt he proposes to pay off with your money."
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#3
08-12-2006, 08:30 AM
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Check the current to the compressor clutch. I have seen these things do a partial short and draw a lot of current. I think the normal current draw is between 3-4 amps.
__________________
I got too many cars!! Insurance eats me alive. Dave 78 Corvette Stingray - 3k 82 242 Turbo Volvo - Manual - 270k 86 300e 5 speed manual - 210k 87 420sel - 240k 89 560sl - 78k 91 420sel - 205k 91 560sel - 85k 94 GMC Suburban - 90k 97 Harley Davidson Heritage Softail - 25k 00 GMC Silverado 1 ton 30k
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