Frigidaire Dishwasher Error Code iC0

User interface communication problem - communication system does not recognize any display board.

First step from the service manual

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

• CdClose dishwasher door
• CEMalfunction error code displayed when the dishwasher…
• CLDoor is open
• E:00No errors stored in memory.
• E:01Faulty pump relay on the power module.
• E:02Faulty heater relay on the power module.
• E:05Faulty water switch relay; water switch runs continually.
• E:06Door latch Hall sensor not detected; dishwasher won't run…