KitchenAid / Whirlpool 15-inch clear-ice undercounter ice makers (KUIX535H class): quick sheet

Covers: Whirlpool-built 15-in automatic clear-ice makers sold as KitchenAid (KUIX535HPS / HPA / HBS and earlier KUIS/KUID) and Whirlpool. Built-in or freestanding; gravity drain or pump. Confirm wiring and test values on the tech sheet behind the lower panel.

Cross-checkedBrands: KitchenAid, Whirlpool8 components

A slab-type clear-ice machine. Water is pumped over a refrigerated evaporator plate, the finished slab is released in harvest and drops onto a heated wire cutter grid that slices it into cubes. The bin is insulated but not refrigerated, so ice slowly melts and is replaced. Status light: green normal, yellow clean soon, red clean now.

Safety first

Unplug before removing the grid or lower panel.
Sealed-system work is blocked (EPA 608).
Do not use ammonia cleaners or dishwash plastic parts.

How it works

Fill: the inlet valve fills a water pan; a recirculating pump sends water over the cold evaporator plate. Minerals stay in the circulating water, which is why the ice is clear and why scale builds up. On this family the pump has a built-in water level sensing function, so a bad pump can cause fill and thickness problems even while it runs.

Harvest: when the slab reaches thickness, the system warms the plate so the slab slides off onto the cutter grid. The grid wires are heated by low voltage from a transformer and cut the slab in two directions. Unit levelness matters: an out-of-level unit lets the slab hang between plate and grid.

Bin: an ice level sensor (thermistor) on the right side of the compartment stops production when ice reaches it. The cutter grid harness plugs in on the left side. Both must be reconnected after every cleaning or the unit will not work properly.

Drain: melt water and purge water leave by gravity or through a drain pump. A dirty condenser behind the lower panel raises operating temperatures and cuts ice output.

Components & tests

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Official manufacturer documentation

Always confirm values against the tech sheet for the exact model.

Whirlpool Product Help: freestanding ice makers

OnCall Tech is a reference tool for trained technicians and can make mistakes. Always disconnect power and confirm with the manufacturer's documentation before you work. © 2026 OnCall Tech. Original content; not a reproduction of any manufacturer document.Generic part photos (not of this brand): Large stainless refrigerator set flush between kitchen cabinets by Alex Qian, Pexels License

Diagnostic guides for this appliance

Guide · Ice Maker

Refrigerator ice maker making small, thin or hollow cubes

In a refrigerator ice maker this is almost always a water-supply problem: low pressure, a clogged or badly seated filter, a kinked line or a reverse-osmosis system starving the valve. Low fill means the mold or tray doesn't fill. On Whirlpool-style ice makers the last cavity, next to the thermostat, starves first and triggers an early harvest. Fix the supply before replacing parts.

8 steps ~30 mineasy

Guide · Ice Maker

Refrigerator ice maker freezes cubes but won't harvest

Rule out the simple stops first: the shutoff arm or bin sensor, the On/Off control and a warm freezer. Then force a harvest with the ice maker's own test (T-H jumper on Whirlpool modules, three arm presses on GE, the Test button on Samsung and LG). If the forced harvest works, the ice maker is fine and the trigger (thermostat/thermistor or temperature) is the issue. If it doesn't, the ice maker usually gets replaced.

7 steps ~30 mineasy

Guide · Ice Maker

Ice maker fill tube frozen (no water reaches the ice maker)

Water freezes in the tube that feeds the ice maker. Thaw it with warm air, then find the cause or it will come back. The usual causes are a valve that seeps between fills, low pressure (slow fills freeze), a freezer set too cold, or cold air blowing on the tube. Replacing the valve is the most common lasting fix.

7 steps ~40 mineasy

Other ice makers manuals

Manual · Ice Maker

Whirlpool-built modular (crescent-cube) ice maker: field service manual

The Whirlpool-style modular freezer ice maker with a plastic module cover marked with test points (T, H, N, L), a metal mold with a heater, an ejector with fingers, and a wire shutoff arm. Used in many brands' freezers. Later Whirlpool electronic ice makers without test points are not covered here.

6 components5 common failuresWhirlpool, Maytag, KitchenAid, Amana, Kenmore (Whirlpool-built)

Manual · Ice Maker

GE electronic freezer ice maker (feeler-arm / paddle style): field service manual

GE's electronic crescent-cube ice maker used in GE freezers (side-by-side, top-mount and bottom-mount), with a feeler arm or paddle, an electronic control and thermistor, and on many versions an On/Off switch with a green LED. Covers the common replacement kit family that superseded older mechanical GE ice makers.

6 components5 common failuresGE, GE Profile, Hotpoint

Manual · Ice Maker

Samsung refrigerator ice makers (ice room, freezer and door): field service manual

Samsung twisting-tray ice makers: the fresh-food-door ice room on French-door and 4-door models, the side-by-side freezer-door ice maker, and freezer-mounted ice makers on top- and bottom-freezer models. Includes Samsung's test-button procedure and the ice-related error codes 14E, 39E/39C and 40E/40C.

6 components5 common failuresSamsung