Belmont's weather is gentle by Bay Area standards, but the wet season has a quiet way of finding a tired appliance. From late fall the marine layer thickens, the rains arrive off the Peninsula, and the damp that hangs around Twin Pines Park and the lower flats settles into kitchens too.
A built-in Sub-Zero will carry on through all of it — but a few minutes before the rains start makes the difference between a quiet winter and a surprise service call.
Clear the condenser before the damp arrives
Through the dry summer a Sub-Zero's condenser quietly collects dust and pet hair. Once the wet season's humidity arrives, that layer turns into an insulating blanket that traps heat against the compressor. A vacuum and a soft brush across the grille — front-mounted on most built-ins — is the single most useful thing you can do before December.
Check the gaskets while the kitchen is dry
Damp winter air shows up a weak door seal fast: condensation at the door line, frost in the freezer, a unit running longer to hold temperature. Run a hand around the gasket now, look for cracks or flat spots, and wipe the seal clean. A gasket caught in the fall is a small fix; one ignored until midwinter usually means months of a fridge working too hard.