ApplianceField Lab
Field evidence

The Ice Was Localized, Not Spread Across the Whole Coil

On this Sub-Zero 632/S2, snow at the lower evaporator-cover area and sharply localized ice on the coil were treated as a pattern that required leak confirmation.

Sub-Zero 632 632/s2 Localized Evaporator Ice

What the case actually documented

  • The exact model was reported as 632/S2.
  • Snow formed on the lower part of the evaporator cover.
  • The photos showed a large block of ice concentrated on one section of the exposed coil.
  • The visible frost was localized rather than described as a uniform blanket.

A similar symptom can have a different cause on another refrigerator. Photographs and the exact location help choose the next test, but they do not prove a refrigerant leak alone.

A large block of localized ice on the exposed lower-left evaporator area.
A large block of localized ice on the exposed lower-left evaporator area.
A closer view of the same localized ice block and the marked evaporator tubing above it.
A closer view of the same localized ice block and the marked evaporator tubing above it.

Why the pattern raised a sealed-system question

Several technicians independently read the photograph as an evaporator leak and proposed evaporator replacement. Their reasoning was the concentration of frost in a limited area, unlike the broader snow blanket expected from some airflow or defrost failures.

The source did not include pressures, line temperatures, an electronic leak-detector result or confirmation after opening the system.

What a proper confirmation needs

  1. Document the complete frost pattern before thawing.
  2. Rule out water entering or freezing from above the localized area.
  3. Compare operating temperatures and pressures with the model documentation.
  4. Leak-test the suspected evaporator before quoting sealed-system replacement as certain.
Refrigerant and electrical safety: sealed-system diagnosis and repair require recovery equipment, approved procedures and qualified service. Do not puncture tubing or add refrigerant based on a frost photograph.
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