Announcement

Collapse
No announcement yet.

fuse box melted, please help

Collapse
X
Collapse
 
  • Page of 1
  • Filter
  • Time
  • Show
Clear All
new posts
Previous template Next
    #1

    fuse box melted, please help

    I replaced the expansion valve on the car, to fix my a/c.. i recharged it, but while doing so, I kicked the blower fan on high, the aux fan kicked in as well.. eveything went well, but just as I was getting ready to leave, I noticed the fan was dead.

    So, I popped the hood, and saw that the fuse cover had started to melt.. I got it off, and saw that fuse 20 was completely melted, it also took out the two fuses next to it.

    According to bentley, fuse 20 powers the blower fan and the aux fan.

    I was pissed off, cause I spend so much time getting the damn a/c to work again, and now that it works, the freaking fuse box is melting.

    So, the fuse DID NOT blow. we ran the fan for aprox 5-10 minutes while charging the system. It heated up and melted slowly. That means the current was less than 30A.

    I re-wired it using a fusible 30A link and turned it back on. Blower works; Aux fan, too. I turned up the fan, and I noticed the new fuse was getting hot. I turned it off, and used a 20A fuse. It blew. So, that would mean the circuit is running between 20 and 30A.

    Help...
    Tags: None
    #2
    Did you meter the draw? A fan needing lubrication would draw far more than normal.

    Luke

    Closing SOON!
    "LAST CHANCE FOR G.A.S." DEAL IS ON NOW

    Luke AT germanaudiospecialties DOT com or text 425-761-6450, or for quickest answers, call me at the shop 360-669-0398

    Thanks for 10 years of fun!

    Comment

      #3
      Originally posted by StereoInstaller1
      Did you meter the draw? A fan needing lubrication would draw far more than normal.

      Luke
      I measured it.. and i figured it out. I pulled the blower motor out and measured it's resistance: ~0.3ohms. I checked my brothers e30. His was 0.8ohms. Si, I took out the motor, blew all the carbon dust out, and measured it again... 0.7ohms

      So, i'm releaved. I realized it's not bmw's fault. because it was the fuse that melted. Perhaps they should've used one of those large fuses for such high current, so it doesn't overheat as much. I'm thinking I should replace the fuse box, or at least use one of the spare slots. I rigged it with an inline fuse, and it bugs me.

      Comment

        #4
        Damn! That must have been a buttload of dust!

        Good job. Go find a decent fusebox, you will be happier.

        Luke

        Closing SOON!
        "LAST CHANCE FOR G.A.S." DEAL IS ON NOW

        Luke AT germanaudiospecialties DOT com or text 425-761-6450, or for quickest answers, call me at the shop 360-669-0398

        Thanks for 10 years of fun!

        Comment

          #5
          replacing the fuse box is going to be very painfull.. there's a loooot of wires inside it, and no connector. I have to pull them all out, one-by-one, and hope that I get them back in correctly.

          Comment

            #6
            I think I'm going to retrofit a large fuse for this circuit. And I'm gonna do the same on my brother's, bacause that fuse gets way too hot for my piece of mind.

            Comment

            Previous template Next
            Working...
            X