Frigidaire · Dishwasher Moderate

iC0 — Communication error

The user-interface board and the main control board can no longer talk reliably. The dishwasher cannot accept commands or report state.

Keep using it?
Yes, with caution
DIY difficulty
Moderate
Verified against
frigidaire.com ↗

How to fix it

  1. Power off at the breaker for 5 minutes.
  2. Remove the inner door panel and reseat the ribbon cable at both ends.
  3. Inspect the ribbon for kinks, tears, or corrosion.
  4. Replace the ribbon cable if damaged.
  5. Swap in a known-good UI board if communication still fails.
  6. Replace the main control board last.

Why it happens

Typical signs: Buttons unresponsive · iC0 displayed on power-up · Display blank or flickering · Cycle won't start or aborts immediately

  • Loose ribbon cable between UI and main board Door slamming can vibrate the connector loose.
  • Damaged ribbon cable Crimped or chafed cable inside the door.
  • Failed user-interface board UI MCU stops responding to polls from the main board.
  • Failed main control board Comm UART failure on the main board.

Parts you may need

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

  • Frigidaire dishwasher user interface board Common replacement
    Amazon →
  • Frigidaire dishwasher main control board Common replacement
    Amazon →

More Frigidaire dishwasher codes

Cd Cd — Door Not Closed / Latched CL CL — Close the door ER ER — General electronic control fault Hot Hot — Water inlet too hot HS HS — Wash Motor Hall Sensor Error i10 i10 — Water Not Detected (Fill)

All Frigidaire codes → All dishwasher codes →

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: frigidaire.com.