blower fuse

[transporter1986]

hi there i am having a problem with blowing the air blower fuse in my 1987 t25. i have looked on the wiki and forums for threads but cannot find any info on my particular problem. When first started and engine has been running for a few minutes the blower works fine on all three settings and then suddenly will blow the fuse. it seems to be happening more now that winter is here. any help would be great.

[1664]

Sounds like your blower motor is struggling to rotate - temperature would affect the viscosity of the lubricant in the bearings. A seized motor will blow the fuse almost instantly but a 'not far off seizing' motor will still drag more electrical current than the circuit was designed for and would eventually cause the fuse to rupture. Does the blower squeal in operation? You may have to remove the dash to access the motor see here
https://club8090.co.uk/wiki/Co ... ater_box_2" onclick="window.open(this.href);return false;
and has photos of where to add lubrication.

There is a method of getting lubricant onto the front bearing without removing the dash by drilling a small hole behind the upper front grill of the van see here
http://www.thesamba.com/vw/forum/viewto ... =fan+drill" onclick="window.open(this.href);return false;

This is presuming there are no wiring faults on the circuit....

Errm just a thought - but what size fuse is fitted?

[CovKid]

My blower was freed off in a similar fashion but it doesn't stop the fuse blowing every now and then. I think the resistance changes as the thing wears or as a result of it once partially seizing and heating up, and the only real cure is a new motor unfortunately. By all means try the above but don't be surprised if the blown fuse problem persists.

I should add that I too have to replace the blower next year (far too cold now) and in my case I've had to fit a much bigger fuse (I don't recommend this) to keep it going in the meantime. Its related to the initial start up after which it runs fine. Clearly the current draw must be unreasonably high when it first spins and no amount of lube will cure that. I'm just nursing mine,

p.s. it does sound as though something on your blower circuit, once warm, starts to offer no resistance which blows the fuse. Post 85 it could be switch, motor, or speed resistor. Pre-85 it could also be the wiper motor as thats on same circuit in the earlier ones.

[transporter1986]

thanks a lot for your suggestions. the problem appears to have gone away for now. i will replace the motor in the spring once weather improves. cheers