[roy29801]

blower motor lurches back and forth, clockwise and counter clockwise. ocassionally the motor will run correctly for a few seconds and then starts lurching again.

 

[beenthere]

Post brand and model of furnace/air handler. So we have an idea if you have a PSC or ECM blower.

 

[roy29801]

Nordyne, GQ3RD-042K

Post brand and model of furnace/air handler. So we have an idea if you have a PSC or ECM blower.

 

[beenthere]

X13 blower motor. Its a constant torque motor. Check for loose low voltage connections, and that all line voltage connections are tight. If they are all tight, motor is gone.