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Originally Posted by Billy1mate
The fan when spun by hand is a bit notchy/stiff but does have free spots where it moves nicely.
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What you've described here sounds normal. I think you might be worrying unnecessarily about the bearing. When I re-brushed my motor I didn't do anything to the bearing, and I've had no trouble since.
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... is this the new brushes on the commutator not bedded in ...
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I can't see how that would result in "notchy/stiff with free spots". Did your new brushes have a concave contact surface to match the commutator by the way?
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... now the fan is back in the car it doesn't work off the air con panel, so it seems the pcb/relays maybe the problem ... might need a new fan, hope not.
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Replacement PCBs are available from
Jules. Relays are available too. Absolutely no need to buy a new fan. You said that it ran satisfactorily on the bench, so the motor must be o.k. I doubt that the T4 will pinpoint the fault; it will just say that the slow/medium/fast speed is inoperative which you know already.
Keep us posted. I recently helped another member diagnose a PCB fault. His fan would never stop running!
Simon.