Guides
Symptoms, explained properly
Written from calls in Denver: what a symptom actually means on a built-in, which faults sit behind it, and the two or three checks worth doing before you pick up the phone.
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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.
Curtis Mahoney
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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.
Curtis Mahoney
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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.
Curtis Mahoney
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.