Common fault
Why does frost keep building up in my freezer?
Short answer
Frost you have already cleared once, coming back a second time, means the defrost cycle is no longer completing. Call Sub-Zero Repair Downtown San Diego on (858) 683-1717 and ask.
The reasoning behind that
On a freezer column there are three usual culprits: the defrost heater has failed, its thermistor has drifted far enough to stop calling for one, or a heavy paneled door has stopped pulling its gasket tight. A few blocks from the bay it shows up faster than it would inland, because every door opening hands the cabinet moister air to deal with, and the cycle now has more water to remove than it can manage. Once the evaporator furs over it insulates itself, and the number on the display stops matching the air inside.
How the diagnosis goes
Clearing the frost by hand tells you nothing except that it will come back. What tells us something is where it forms: on the rear wall over the evaporator points at defrost, around the door and along the top edge points at the gasket or at a door that is not closing square on its hinges, and ice on the floor of a drawer usually means the drain trough underneath has closed up.
Check the seal yourself in thirty seconds. Shut a strip of paper in the door and pull it out, and do it at six or eight places all the way around, not just at the handle. Anywhere it slides out with no resistance is a section of gasket that is no longer pulling, and on a built-in with a heavy custom panel that is often a hinge or an alignment issue rather than the gasket itself.
If that matches what yours is doing, say so when you call — it decides which parts come on the van.
Appliance down in Downtown San Diego?
Tell us the brand and what it is doing — we can usually name the likely repair before we arrive.
Questions
Answers before you call
Is the work warranted?
Both the parts we supply and our labor are covered, with the terms printed on your repair invoice, so keep it. In a condo it is also what a management office asks for later if water was involved. If the factory warranty is still on the unit, say so first: sealed-system coverage can depend on who does the work. Sub-Zero Repair Downtown San Diego answers that on (858) 683-1717.
Is a built-in worth repairing, or should I replace it in a downtown condo?
Repairing usually wins, and in a high-rise it wins by more. Replacing an integrated column is not swapping a box: it means matching an exact cabinet opening, remaking or reusing a custom panel front, and getting the new unit through a corridor the original passed before the millwork was finished around it. The faults we actually see are ordinary parts. Say so when you call Sub-Zero Repair Downtown San Diego on (858) 683-1717.