Refrigerator displays H1 and temperature display may flash; unit may be too warm.

Safety first: No internal electrical work is required for basic checks, but unplug the unit if removing panels.

• Check doors: Ensure all doors and drawers are fully closing and gaskets are sealing. Look for items preventing closure.
• Verify airflow: Make sure air vents in the fresh food and freezer sections are not blocked by food packages.
• Allow recovery: If doors were left open or the unit was recently loaded with warm groceries, allow 24 hours for temperatures to stabilize.
• Inspect for frost buildup: If the freezer back wall is frosted over, a defrost issue may be causing high temps. See defrost-related entries for further steps.
• Sensor check: If H1 persists with proper cooling, test the temperature sensor for correct resistance and replace if out of spec.