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  #1  
Old 07-17-2010, 02:02 AM
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Join Date: Oct 2002
Location: Pasadena, CA
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What did I do? A/C blower E420 burned strip fuse holder

So my blower has been giving me problems. I diagnosed that I needed a blower regulator in my 1995 E420, so I bought a new one and put it in.

I have a spare blower motor and have been looking for replacement brushes for it. I couldn't find any in the correct size, so I ordered some from Ebay, and they are on the way. I THOUGHT the current blower motor still had some life left...

At this point, I had high fan speed and lo fan speed, but no auto functioning. I found my aspirator blower was not running, so I ordered that motor and have it now.

Suddenly, while A/C blower on high, the blower cuts out, and I see some smoke coming from the drivers side engine compartment. My 30 AMP strip fuse holder is completely melted.

I realize I should have just replaced the blower motor brushes when I did the regulator, but I didn't and now I have made things worse. This seems to be a recurring theme with my DIY projects. Grrrrrrrrrr! Anyway, what do I do now?

I have the brushes coming....hopefully next Monday. What do I do about the burned fuse holder and wires? How do I figure out what caused this....or rather how because we know the what (me!)?

Any help is greatly appreciated. It is ~100 degrees.

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1984 300D---Sold
1995 E420 - 106K - Brilliant Silver Metallic/Orion Gray --- Sold
1984 300SD - 151K Manganese Brown Metallic/Mostly Black --- Sold
1982 240D - 79K - Manila Beige/Palomino---Sold
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Old 07-18-2010, 01:58 AM
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Join Date: May 2009
Posts: 398
bearings needing grease in the blower motor did you in. Brushes were probably fine. The resistance in the blower motor didnt pop the fuse but heated it slowly till it melted stuff, Drawback to a wide fuse slow pop. My aux fan fuse did it, its against the firewall and is the same type of fuse.
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Old 07-23-2010, 01:49 PM
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Join Date: Oct 2002
Location: Pasadena, CA
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I am not comfortable at all with electrical issues, so I took the car in to Enrique. He diagnosed the problem as a connector from (to?) the ignition switch. I also had him replace the aspirator blower motor for the cabin temp sensor. The problem now is there is a loose connection somewhere from the aspirator to the temp sensor grille, as the paper on the grille does not hold. AC is working great.....just no auto functioning.

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RT


1984 300D---Sold
1995 E420 - 106K - Brilliant Silver Metallic/Orion Gray --- Sold
1984 300SD - 151K Manganese Brown Metallic/Mostly Black --- Sold
1982 240D - 79K - Manila Beige/Palomino---Sold
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