blower motor wires overheating
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blower motor wires overheating
I have a 1996 A4 b5 1.8 Auto. It has seen considerable repair and maintenance in the five years of ownership and drives like a new car.
One of the advantages of Thailand is incredibly cheap labour despite higher parts prices...a mechanic and his assistant were costing per day what I would have paid per hour in New Zealand.
One of the repairs was replacing the AC compressor and condenser but not the evaporator.
This car has the climate control air con which has never worked correctly since ownership.
It is impossible to select which direction the air will go, Fan and Heat controls are no problem.
The problem is the climate control unit.
It has been impossible to find the correct model of climate control for this car despite many attempts to find in Thailand and New Zealand.
The air con never seems to blow very cold even if the flap control motors are disconnected and the flaps set to full cold full fan etc, from before air con repairs until now.
And recently the fuse controlling the blower melted rather than blew and made a somewhat mess of the fuse box.
It seems that the wiring for this fuse ran hot but continued to function
I have taken a feed off the bus bar feed for the relays and installed a standalone 30 amp fuse that supplies the blower motor.
I have taken the blower motor out and disassembled it and given it a damn good clean and oiled the bearings and checked the brushes. It runs fine out of the car on a test bench.
The evaporator is fairly clogged with 30years of grime so I am treating that with a proprietary aerosol cleaners followed by a soft water rinse, I will need to do this a few times to remove as much of the grime as possible and get hopefully more cold air for the cabin.
However after reinstalling the blower, I have noticed the blower motor wires are running very hot, which suggests that the original problem is still present and there is something going somewhere else in the system using the same circuit.
My question is; would the electric radiator fan be run on the same circuit and if this fan is getting suspect could it cause heating of the blower wires. I have noted the wires feeding this fan run hot as well especially through the plug located in front of the power steering fluid reservoir.
Or has anyone else had a similar issue and point me in the right direction to check
Many tanks
k
One of the advantages of Thailand is incredibly cheap labour despite higher parts prices...a mechanic and his assistant were costing per day what I would have paid per hour in New Zealand.
One of the repairs was replacing the AC compressor and condenser but not the evaporator.
This car has the climate control air con which has never worked correctly since ownership.
It is impossible to select which direction the air will go, Fan and Heat controls are no problem.
The problem is the climate control unit.
It has been impossible to find the correct model of climate control for this car despite many attempts to find in Thailand and New Zealand.
The air con never seems to blow very cold even if the flap control motors are disconnected and the flaps set to full cold full fan etc, from before air con repairs until now.
And recently the fuse controlling the blower melted rather than blew and made a somewhat mess of the fuse box.
It seems that the wiring for this fuse ran hot but continued to function
I have taken a feed off the bus bar feed for the relays and installed a standalone 30 amp fuse that supplies the blower motor.
I have taken the blower motor out and disassembled it and given it a damn good clean and oiled the bearings and checked the brushes. It runs fine out of the car on a test bench.
The evaporator is fairly clogged with 30years of grime so I am treating that with a proprietary aerosol cleaners followed by a soft water rinse, I will need to do this a few times to remove as much of the grime as possible and get hopefully more cold air for the cabin.
However after reinstalling the blower, I have noticed the blower motor wires are running very hot, which suggests that the original problem is still present and there is something going somewhere else in the system using the same circuit.
My question is; would the electric radiator fan be run on the same circuit and if this fan is getting suspect could it cause heating of the blower wires. I have noted the wires feeding this fan run hot as well especially through the plug located in front of the power steering fluid reservoir.
Or has anyone else had a similar issue and point me in the right direction to check
Many tanks
k
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TwanA4B5
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Oct 6, 2011 09:08 AM