Sub-Zero Refrigerator Cooling System Restriction Repair
This Sub-Zero refrigerator repair in Woodstock involved a built-in all-refrigerator unit that gradually stopped cooling. Over several days, the temperature kept rising until the fresh food section reached about 60°F.
Issue – Sub-Zero Refrigerator Not Cooling Properly
The refrigerator was running, but cooling performance kept getting worse. By the time we arrived, the temperature inside had climbed to roughly 60°F, making the unit unsafe for food storage.
Diagnosis
During the initial visit, a sealed system problem was suspected. Because this type of repair requires deeper refrigeration diagnostics, we dispatched Dmitry, our sealed system specialist.
After checking pressures and refrigerant flow, Dmitry confirmed a restriction in the capillary tube. This blockage was preventing proper refrigerant circulation and causing the gradual loss of cooling.
Repair Performed
The sealed system was fully evacuated and purged with nitrogen. We replaced the filter drier, pulled a deep vacuum, and recharged the unit to specification. The refrigerator was then tested through a full cooling cycle.
- Confirmed sealed system restriction
- Evacuated refrigerant from the system
- Purged system with nitrogen
- Replaced filter drier
- Pulled deep vacuum
- Recharged sealed system to specification
Result
After the repair, the Sub-Zero refrigerator returned to normal cooling operation. Temperatures stabilized and the unit began cooling like new again.
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