Display shows E0; refrigerator may not cool or may be stuck in a default mode.

Safety first: Disconnect power before accessing the control board. Electronic components are sensitive to static.

• Reset the refrigerator: Unplug for 5–10 minutes, then restore power. Observe if the E0 code returns.
• Check model configuration: Some JennAir boards require configuration (via jumpers or programming) after replacement. If the board was recently replaced, verify that the correct configuration code for your model has been entered (this usually requires the tech sheet stored behind the toe grille or rear panel).
• Inspect the main control board: Look for burned components, cracked solder joints, or signs of overheating.
• When to call a technician: If the E0 code persists and the board appears damaged or misconfigured, the main control board likely needs replacement and proper programming by a professional.