I have a problem with a Bosch refrigerator made in Brazil. The compressor starts and runs normally from cold, but when the thermostat calls for re-start from hot the compressor just buzzes and eventually kicks out on the Klixon overload. After 1-2 hours it starts and runs again normally. I have tried replacing the capacitor, Klixon and PTC with no improvement. When hot, the motor windings check out at 10 ohms on the run coil and 19 ohms on the start coil. Neither winding has leakage to ground. Note that in this system the PTC (disc type) is wired across the capacitor, putting the capacitor in series with the start coil after start-up. The local repair guys say I need a new motor/compressor but I am puzzled that if the windings are not grounded or open-circuit what is wrong with the motor?