Refrigerator section freezing food, especially items near the back or bottom shelves.

Safety first: Unplug the unit before accessing sensors or dampers.

Settings and loading:

• Raise the refrigerator temperature setting by 1–2 degrees and monitor for 24 hours.
• Avoid placing highly perishable items directly in front of cold air vents.

Component checks:

• Locate the air damper (often in the upper rear of the fresh food section) and verify it opens and closes during operation.
• Inspect the refrigerator thermistor for proper placement and damage.

Repair: Replace a stuck-open air damper or faulty thermistor with Summit-compatible parts. If overcooling persists, the main control board may be mismanaging compressor run time and require replacement.