• Verify the refrigerator is plugged firmly into the wall outlet and the outlet has power
• Check that your home circuit breaker has not tripped; reset if necessary
• Confirm the refrigerator doors are closing completely and seals are not torn or damaged
• Ensure the refrigerator temperature setting is not set to the warmest position
• Verify air vents inside the refrigerator compartment are not blocked by food or containers
• Check that the condenser coils on the back of the unit are not clogged with dust
• Inspect the fresh air damper control (if equipped) to ensure it is functioning and not stuck
• Replace the air filter if your model has one, as a clogged filter can affect cooling performance
• For models with water dispensers, verify the water supply line is not kinked or frozen
• Unplug the refrigerator for 60 seconds, then plug it back in to perform a complete reset
• Allow 30 minutes after plugging back in for the system to stabilize before checking for error code recurrence
• Note the exact time and conditions when E1 appears to help identify if it is intermittent