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GE Dishwasher Fault Codes - From Late 1990's forward

Failure Code	Condition	Check/Repair
PF	Power Failure	Push cancel to clear. If code persists check electrical connections to dishwasher and electronic control
C1	Partially restricted drain, pump-out not accomplished in the normal time of less than 95 seconds	Check drain line, if clear, check for a restricted drain valve in pump
C2	Drain line totally blocked, pump-out not accomplished in the maximum time of 405 seconds	Check drain valve for restriction in pump, check drain line. Note: If a new garbage disposer was installed, remove knock out plug for dishwasher drain
C3	Will not go into drain	Call for service
C4	Water over-fill fault	Check for high water pressure to unit, usually an indication of a bad water inlet valve
C5	Low water fill	Check for low water pressure to unit, usually an indication of a bad water inlet valve
C6	Water temperature too low after 20 minute extension	Check heating element and thermostat, both should have continuity
C7	Temperature sensor bad	Replace sensor (located inside door, remove door panel to access)
C8	Detergent cup blocked	Keep objects clear of cup when loading