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Has anyone had any trouble with their fan motor quit working ? Mine was work one day and not the next . Fuse is good
Hi, I have the same problem. If I hit a pot hole it will go off and then come in again about 3-4 days later. Has anyone given you any ideas?
 

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The heater blower fans have armature brushes that make electrical contact. It’s possible yours are wearing down to the point of needing replacement. Another possibility is a loose wire or connection on the motor or speed resistor units, or a faulty resistor pack itself.
 

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This is a very common fault with the 451 as the copper commutator segments get covered in black carbon off the brushes, and you get 'dead spots' so the motor does not turn until you hit a pothole or bump and the motor mechanically moves round a bit and you then get out of the 'dead spot' and the motor starts up agian. It is a cheap design of motor hence the build up of black carbon on the segments within two or three years. SOLUTION: remove motor, undo the one screw that holds the motor cover on and clean the commutator segments turning them from black carbon to the copper underneath by using a piece of emery block (emery paper on foam block). replace the motor and job done that should last for at least another two years. NOTE on UK 451 RHD version, you have to lower the fuse box carefully by a few inches, to get access to remove the fan motor. The motor/fan comes out with a half turn from vent shaft. (Seen it, done it, sick of it :D)

 

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This is a very common fault with the 451 as the copper commutator segments get covered in black carbon off the brushes, and you get 'dead spots' so the motor does not turn until you hit a pothole or bump and the motor mechanically moves round a bit and you then get out of the 'dead spot' and the motor starts up agian. It is a cheap design of motor hence the build up of black carbon on the segments within two or three years. SOLUTION: remove motor, undo the one screw that holds the motor cover on and clean the commutator segments turning them from black carbon to the copper underneath by using a piece of emery block (emery paper on foam block). replace the motor and job done that should last for at least another two years. NOTE on UK 451 RHD version, you have to lower the fuse box carefully by a few inches, to get access to remove the fan motor. The motor/fan comes out with a half turn from vent shaft. (Seen it, done it, sick of it :D)

You are a star. Thank you ?
 

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What you really have to be careful of in the whole process is to not damage the fan blade itself. It will be fragile and brittle. Just be careful removing it from under the dash area and very gentle fitting it back into place.
 
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