Guides
Two series, six parts
One on what Denver does to a cabinet that is working properly. One on what to expect from a cabinet that has been working for twenty-five years.
Denver Conditions
What this altitude, this air and this water do to a built-in that is working perfectly well.
- Part 1 Why a Sub-Zero Freezer Frosts Over in Denver's Dry Air Recurring frost on the rear panel of a Sub-Zero freezer is a symptom, not a fault. In a city this dry it points at a door seal or the defrost circuit far more often than at humidity — here is how to tell which.
- Part 2 The Garage Sub-Zero Problem: Why Denver Freezers Fail in Winter and the 60–90°F Rule Sub-Zero Puts in Writing Sub-Zero designs its indoor built-ins for a 60°F to 90°F room, so an unheated Denver garage sits outside that band for much of the year — which is why the freezer thaws while the fresh-food side still reads perfect. Ambient temperature is the first thing we measure.
- Part 3 Cloudy, Hollow or Fused Ice: What Denver Water Does to a Sub-Zero Ice Maker The shape of the cube tells you where the fault is. A guide to reading Sub-Zero ice — hollow, cloudy, small or fused into a lump — and what scale from city water does to fill, harvest and the drain underneath.
Keeping an Older Sub-Zero Running
What goes first, what to check in the first week, and how to keep a good cabinet through a remodel.
- Part 1 What wears out first on a 25-year-old Sub-Zero, in order Parts on an older built-in do not fail at random. They fail in a sequence, and knowing it tells you whether the next call is a seal or a sealed system — and what to check before you spend anything.
- Part 2 Inheriting a Sub-Zero with the house: a first-week checklist A built-in came with the house and nobody left you the paperwork. Seven checks for the first week that tell you what you have, how old it is and whether anything needs doing before it becomes urgent.
- Part 3 Keeping the old Sub-Zero through a kitchen remodel: clearances, power, panels A working built-in is worth designing around, but only if the opening, the grille height, the airflow and the circuit are settled before the cabinetmaker starts. What to hand your contractor.
- Part 4 Sub-Zero After a Flood: Is the Refrigerator Still Safe to Use? No. If floodwater reached a refrigerator or freezer, even partway up the base, USDA food-safety guidance says it is unsafe and must be discarded. Here is how Denver Sub-Zero owners tell a submerged unit from a dry one and plan what comes next.
Articles explain a fault; the series reference identifies the cabinet. Every one of them starts from the rating plate . Two of the three Denver pieces end in freezer repair .
Two ways in, and nothing to fill in
Give us the model number and what the cabinet is holding. That is usually enough to know which circuit is at fault before anyone is dispatched — and which parts belong on the van.