These refrigerators use a dual-evaporator cooling system — separate evaporator coils for the fresh-food and freezer compartments, rather than one shared coil. The fresh-food evaporator has its own small defrost heater that’s supposed to melt off the frost that naturally accumulates during normal operation. The core allegation across the litigation is that this defrost heating system is insufficient: it doesn’t fully clear the evaporator, so frost and ice periodically build up, restrict the airflow passing over the coil, and progressively choke the refrigerator’s ability to cool food.

What makes this failure dangerous is that it’s invisible until food spoils. The ice accumulates behind an interior panel where you can’t see it, and the fridge keeps running and looking normal while its cooling capacity quietly drops. By the time the symptoms are obvious, the evaporator is often heavily iced. A related but distinct version involves the control panel: when the defrost function fails through a faulty control board, ice can accumulate on the outside of the doors, eventually preventing them from closing and leaking water onto floors and cabinetry.

The pattern is specific enough to recognize. The refrigerator section warms up while the freezer stays cold — the opposite of what people expect, because the iced-over evaporator is in the fresh-food cooling circuit. Food in the fridge spoils faster than it should. You may hear the evaporator fan straining or buzzing as it pushes air against an ice wall. Periodically the fridge seems to recover — that’s the defrost cycle briefly melting enough ice to restore some airflow — then it warms again as ice rebuilds. On the control-panel variant, you’ll see frost or ice forming on the outside of the doors and water pooling at the base.

If you pull the interior rear panel of the fresh-food compartment and find the evaporator coil encased in frost, that’s the signature of this defect rather than ordinary wear.

The models below are the Whirlpool-manufactured three-door bottom-mount French door refrigerators with the dual-evaporator system, manufactured 2012 through 2019, identified in the evaporator-freezing class action. They carry serial numbers in the range K212*** to K911***, found on the tag inside the door frame alongside the model number. The trailing characters (shown as **) vary by color and minor revision.

A second class action targets the control panel rather than the evaporator heater directly. It alleges that model-specific “cntrl-elec” control-board components cause the defrost function to fail, allowing ice to accumulate — in this version, on the outside of the doors — and to ripple into other components like the evaporator coils. This case spans roughly 100 model numbers across Whirlpool, Kenmore, Maytag, JennAir, and KitchenAid, and it followed a separate $21 million settlement over earlier defects.

The control-board part numbers named in that litigation:

If your fridge has frost building on the outside of the doors and a control board carrying one of these numbers, it falls into the control-panel category rather than the evaporator-heater one.

There are three overlapping resolutions, and which one applies depends on the failure type.

Check the model and serial number first — they’re on the tag inside the fresh-food door frame. If the model matches one of the lists above and the serial falls in the K212***–K911*** range, the defect is documented rather than ordinary failure, which matters for both the repair decision and any settlement claim. Photograph the iced evaporator if you open the rear panel, and keep every service record dated, since claims require proof.

For the repair itself, a defrost-system failure on these units typically means replacing the defrost heater, the defrost thermostat or bi-metal, or the control board, depending on which variant you have. Because the underlying design is the issue, a single repair doesn’t always end the cycle — owners frequently report the icing returning, which is exactly why the litigation exists. Where a covered model qualifies for a settlement repair benefit, pursuing that route can be more sensible than paying out of pocket repeatedly. (Compare against typical prices in our refrigerator repair cost database.)

If your refrigerator is icing over and losing its cooling and you’d rather have the defrost system diagnosed properly before deciding whether to repair or claim, Neighborville’s technicians identify the exact failure on the first visit across all our service areas. The same crews handle the symptoms this defect produces — see our guides on a fridge that’s warm while the freezer stays cold, an ice maker that’s stopped making ice, and a refrigerator that isn’t cooling, all of which can stem from a frosted-over evaporator.