We had the same problem on our John Lewis JLWM 1201. Ours also made a "fizzing" noise when the motor was turning in one direction which was accompanied by an electrical burning smell. Our machine filled and emptied but refused to spin. It showed no error codes.
We bought the machine new in 2005 and it never missed a beat and hasn't needed any parts until now or shown any faults. Amazing considering how much use it gets! (We are a family of 4).
I repaired ours by replacing the carbon electrical brushes in the motor. The parts I bought were: "ELECTRUEPART Carbon Brush & Holder" order code CBN9041. The packet says "To Fit: Whirlpool AWG329, AWG345, G29PWD2WH, WT19191 and Zanussi FLA1101". Price £23.00.
I bought mine from Fox Electrical, 239 Queens Road, Beeston, Nottingham, NG9 2BP. Tel: 0115 922 1005.
They were easy enough to fit in principle, its just that access to the motor was tricky. The JLWM1201 does not have a rear access panel so you have to tilt the machine forward 45 degrees, then work on it from underneath. The motor is on the bottom of the drum at the rear. Two 5.5mm nuts and one push on spade connector per brush. Very fiddly access-wise but done with motor and drive belt in-situ. I got away without removing the motor. Phew! Hope this info helps.
Daddy Baddy, October 2012