The short answer
On the Avanti WCR models this page covers, frost and ice are a symptom of moisture entering a cold box, not of the cooling working too well. This is a narrow glass-door cabinet holding a still, tightly banded temperature over racked bottles, cooled either by a small compressor circuit or by a thermoelectric module depending on the model, so the entry points are few and they can be checked in order in an afternoon.
What you observe on these models
- A sheet of frost on the rear interior wall — A sheet rather than a dusting is the airflow-closing kind, and it is the version that ends as a temperature complaint.
- Ice at one point of the door line — Ice concentrated at a single point on the seal is a map: the air is entering exactly there.
- Ice under the lowest shelf or basket that returns after clearing — Meltwater that cannot leave.
- NEAR MISS — no ice, but the cabinet will not hold temperature — That is a cooling-failure page, not this one.
Causes, most likely first on WCR
- Airflow blocked by the load itself — Bottles or packages against the rear wall create a cold pocket that ices while the rest of the cabinet runs warm. Bottles touching the rear wall are the classic version of this on a wine cabinet. It leads the list on Avanti WCR because these are wine cabinets — a two-size wine cabinet line concentrates this fault in a way a full-size machine does not.
- Room humidity and how often the door opens — Every door opening exchanges the cabinet air for room air, and the water in that air stays behind. A cabinet opened constantly in a humid room ices for no other reason.
- A set point below what the load needs — A cabinet set colder than it needs to be will freeze its contents and frost its walls, and on a narrow-band cabinet the margin for this is small. A narrow-band cabinet set a little too cold frosts the bottles nearest the rear wall first.
- A door seal drawing humid room air — Warm room air meeting a cold surface deposits water, and at these temperatures that water becomes ice at the point of entry — which is why the ice is always worst nearest the leak. Last on this list, and the item that every cause above it can imitate exactly.
Check in this order, and why that order
- Clear the ice completely, with the power off, and note the date — You cannot diagnose ice you cannot see the growth of. Defrost with time rather than heat, and never chip at it — the tubing under the surface is thin-walled.
- Check the seal at every point of the door line — A strip of paper closed in the door and pulled at intervals will find a slack point. On a glass door, check the hinge side, which is the side people never check.
- Read the set point and ask what the cabinet is actually for — A cabinet set colder than its load needs will frost regardless of its condition, and the set-point band is narrow, so a fault that would be invisible in a food refrigerator shows up here as a visible temperature error within hours.
- Count the door openings and note the room — Humid rooms and frequent opening produce ice with nothing broken at all. If the ice returns slowly and evenly, this is the answer.
Before you open anything
Safety
Unplug the appliance or switch off its breaker before clearing ice or removing any panel. Never chip, lever or heat ice off an evaporator or an interior wall: the tubing beneath is thin-walled and a puncture ends the cabinet.
Models this page covers — the WCR family
Reference| Model number | Family key |
|---|---|
| WCR496DS | avanti:refrigerator:wcr |
| WCR506SS | avanti:refrigerator:wcr |
When to call a technician
Call when ice returns quickly after a full defrost and the seal, the drain and the set point are all ruled out, because at that point the defrost arrangement or the sensor that governs it is the remaining candidate. Call immediately if you find ice where a line enters the cabinet, or if clearing the ice has exposed damaged tubing. Check the plate before acting on any of this. WCR is a two-size wine cabinet line, and the ranking above is written for that construction rather than for the brand as a whole.
Other problems covered for the WCR family
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