Dead mode shifter won't shut the machine down but you are right about the 4 blinks. The mode shifter thermal fuse opens due to a fault in the motor firmware. Most of the time you need the motor too to prevent it from recurring. Refer to GE Tech doc HL 01-09 to see if yours is an affected model.
HL01-09 Mode Shifter Coil Opening.pdf 279.48KB 8 downloads
- Samurai Appliance Repair Man likes this