Notes from the service bay.

Owner's guides written by the people who repair these machines every day. How to care for a Sub-Zero or a Wolf, what the indicator lights mean, and when it is time to call.

A glass door Sub-Zero refrigerator in a dark wood Los Angeles kitchen

Owner's guide · August 9, 2026 · 7 min read

Sub-Zero Maintenance: The Two Cartridges Most Owners Forget

A Sub-Zero should outlast every other appliance in the house. Whether yours does comes down to two small cartridges and a habit most owners were never taught.

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