SY CE Moderate Easy DIY

Frigidaire Refrigerator SY CE — Communication Error at Startup

Frigidaire Refrigerator · Error code SY CE

What SY CE Means

Brief communication error when the unit first powers on — often clears itself after the boards complete handshake.

Symptoms

  • SY CE flashes briefly at power-up
  • Display blank for a few seconds
  • Resumes normal operation after self-clear

Common Causes

1
Slow handshake between UI and main board

Cold-boot timing miss between the two MCUs.

2
Marginal harness connection

Connector partially seated.

3
Brief power dip

Brownout during startup.

How to Fix It

  1. Unplug refrigerator for 2 minutes, then plug back in.
  2. If code clears and does not return, no service required.
  3. If recurring, reseat the UI-to-main-board harness.
  4. Plug refrigerator into a different outlet to rule out a flaky circuit.
  5. If still recurring, treat as SY CF and replace UI board, then main board if needed.

More Frigidaire Refrigerator Codes

1F 1F — Ice Maker Fault 1 SH 1 SH — Fresh Food Sensor Shorted 1 SY 1 SY — Fresh Food Sensor Open 2 SH 2 SH — Freezer Sensor Shorted 3 SH 3 SH — Evaporator Sensor Shorted 3 SY 3 SY — Evaporator Sensor Open

All Frigidaire codes → All refrigerator codes →

Verified against manufacturer documentation: frigidaire.com

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.