Defect Code 04

Defect code: O4, Right heater sensor

Explanation: This defect code is stored when there is a short to ground, to plus or a break at the connector, white Pin 25.

Effect of defect: If the defect is a current defect, a substitute value of 55°C is used.

Possible cause: Voltage supply not OK, wire or right heater sensor defective.

Troubleshooting: Check voltage supply (approx. 5 V with sensor disconnected) as well as wires and repair if necessary or replace component.