--- title: "Not cooling after a power outage" description: "Sub-Zero not cooling after a power outage — a unit that came back up and never quite recovered, or did not restart at all." url: "https://subzeromiami.support/symptoms/not-cooling-after-power-outage/" date_modified: "2026-08-18" Appliance type: "Built-in refrigerators" --- # Sub-Zero not cooling after a power outage ### The fastest diagnosis is the code If a code arrived with the outage, it is the shortest route to the answer — start components and control boards are what surges reach, and the code says which. Photograph it, then call. ### Why this is a South Florida page It appears in the keyword data unprompted, which is a fair measure of how often it happens here. A cut and a surge are different events with different consequences: a cut asks the unit to restart under load, a surge can take out start components or a control board on the way through. ### The pattern we see - Units that restart but do not come back to temperature for days, or ever - Ice production that returned at half rate - One side of a dual-refrigeration cabinet recovering and the other not - A control board that survived the outage and failed a week later Storm season What it usually means Restarted, but never came back to temperature Ice maker at half production since Display blank, or a code that arrived with the storm The fastest diagnosis is the code If a code arrived with the outage, it is the shortest route to the answer — start components and control boards are what surges reach, and the code says which. Photograph it, then call. Why this is a South Florida page It appears in the keyword data unprompted, which is a fair measure of how often it happens here. A cut and a surge are different events with different consequences: a cut asks the unit to restart under load, a surge can take out start components or a control board on the way through. The pattern we see Units that restart but do not come back to temperature for days, or ever Ice production that returned at half rate One side of a dual-refrigeration cabinet recovering and the other not A control board that survived the outage and failed a week later A breaker rather than the appliance Check the breaker and not only the outlet. It is the first thing to rule out and the only one on this list that costs nothing. Start components the surge reached A cut asks the unit to restart under load; a surge can take the start components out on the way through. A unit that hums and does not start is the classic. A control board that survived and then failed We see boards come through the outage and fail a week later. If it restarted and then stopped again, that gap is the story. A cabinet still recovering A full cabinet takes hours, not minutes, to come back down. Give it that before judging — the ice maker is usually the last thing to return. Check the breaker, not only the outlet It is the first thing to rule out and the only thing on this list that costs nothing. A built-in unit often sits on its own circuit. Give it a few hours before judging A full cabinet takes hours to come back down, not minutes. Judging it twenty minutes after the power returns tells you almost nothing. Note whether the ice maker restarted It is usually the first thing to stay down and the last to recover, which makes it a useful early signal. Then book the visit Photograph any code that arrived with the storm, and say whether it was a cut or a surge — they reach different parts of the unit. --- **[Read full article: Not cooling after a power outage](https://subzeromiami.support/symptoms/not-cooling-after-power-outage/)**