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Date: Sun, 4 Jun 2000 12:03:05 +0200
From: "Bram" <s9301607NSnopsament.utwente.nl>
Subject: Re: overheating


"Robert Brown" <rjbnopsamnetDONOTSPAM.se> wrote in message news:393A1D94.CCEB4F7FnopsamnetDONOTSPAM.se... > Hi, > > My guess is that the fan itself could be the culprit. If the fan is not turning > freely (i.e. a lot of mechanical resistance), it will be much more likely to > trip your fuses. Pull the fan motor apart, clean, and relubricate. > > You may also consider getting a new fan (or equivalent from a wrecker). Even if > this is a more expensive solution, it's very cheap insurance compared with the > costs for a cracked cylinder head (which I got once when my radiator fan packed > it in one day without me noticing). > > Regards, > Robert > Gothenburg (1983 900 GL, 1999 9-3 200) > > Kirk Johnson wrote: > > > I overheated yesterday to the point of coolant boiling over, then realizing > > that the fan was not kicking on. I found that the fuse was burned out, > > replaced it, started working normally again. Today the fuse burned out > > again! Does anyone have a suggestion as to what would cause this? A short in > > the harness somewhere? Could it be that the fan is old and drawing more > > current than it should? > > > > Thanks, > > Kirk > > > > by the way, its a '89 900 turbo convertible > Indeed this could be the case, but also it is possible that the electric motor driving the fan is bad. This could be just wear or could be caused by to much resistance. Anyway, if the motor is bad the fuse will keep burning out. If the wires inside are molten together the motor draws more current (shortcircuit). If the motor is blocked by the fan, the motor also will draw more current. Bram

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