Sinclair SDV4 series - Page 68

78 Troubleshooting
4.4 E4: T3&T4 sensor malfunction
LED displays E4
Judge: whether the body is broken.
Replace main PCB
Judge: T3&T4 sensor malfunction
Connect the wire again.
YES
NO
Judge whether temperature sensor pin connects
properly.
YES
Connect again.
NO
NO
Replace T3/T4 sensor
YES