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Nov 27, 2017 at 23:28 comment added Bird Yes to both of the first questions, humming and turning. I'm not sure about the DCR - is that DC resistance? My understanding is that it's an AC motor. One winding has much higher resistance than the other (see original post); I think the higher resistance winding is the start coil (thinner wire).
Nov 27, 2017 at 23:15 comment added D.A.S. Does it hum loudly when on? Does it freely turn when Off? 6x normal current A to AZ is the starter winding much lower DCR than the run coil Z to ZT
Nov 27, 2017 at 23:13 comment added Bird I did think that might be the problem, but I've checked this very carefully and established that the switch is indeed closed when the motor is at rest, and current is running across it.
Nov 27, 2017 at 23:03 history answered JRaef CC BY-SA 3.0