The generator ran the refrigerator all weekend. Is it damaged?

Probably not, though it is worth watching. A unit cooling normally afterwards has told you most of what you need to know, while one that will not restart, or that trips whatever it is plugged into, is a call to Sub-Zero Appliance Repair Los Angeles on (310) 496-7399.

Why will it not come back on once the power returns?

Sometimes the cabinet is not the problem at all. A surge protector, an AFCI or a GFCI anywhere in the path can trip and stay tripped, so the outlet and the breaker get checked before anything of ours is opened up. That check costs nothing.

Los Angeles Sub-Zero Service - Generator Backup

Can a Sub-Zero Run on a Generator or Home Battery?

What you are looking at	What it means
Our own position	A cabinet like this is not built to live on generator-supplied power for long stretches
Short runs	Can be acceptable, and it is a badly sized supply that does the harm
Starting against running	A cabinet can ask considerably more in the second it starts than to keep going
When it will not restart	Check the outlet, the protector and the breaker before assuming the cabinet is at fault
Who sizes the supply	An electrician, reading the total amps printed on your own rating plate

A short run on a well-sized generator is a judgement call; a long outage is a question for an electrician rather than for the cabinet. Sub-Zero Appliance Repair Los Angeles: (310) 496-7399.

Hands holding a red and blue manifold gauge set at the open lower bay of a built-in refrigerator, compressor dome and copper filter-drier behind — In this frame

Compressor
Filter-drier
Manifold gauges

Where we would ask you to stop

Through a long outage the safer course is to switch the unit off at the breaker until proper power is back, rather than feed it something approximate. A supply that sags or wanders is harder on a compressor than none at all, and nothing inside the cabinet should be assumed to be standing between the two.

A home battery is judged the same way

Not by whether it can carry the running load, but by whether it can carry the start. Total amps are printed on the rating plate, and that plate in an electrician’s hands is the whole answer.

Two more things people ask

The generator ran the refrigerator all weekend. Is it damaged?: Probably not, though it is worth watching. A unit cooling normally afterwards has told you most of what you need to know, while one that will not restart, or that trips whatever it is plugged into, is a call to Sub-Zero Appliance Repair Los Angeles on (310) 496-7399.
Why will it not come back on once the power returns?: Sometimes the cabinet is not the problem at all. A surge protector, an AFCI or a GFCI anywhere in the path can trip and stay tripped, so the outlet and the breaker get checked before anything of ours is opened up. That check costs nothing.