Ice makers fail in three patterns: no ice at all, slow ice, or bad ice (hollow, small, or cloudy cubes). Each pattern points to a different cause. Work through these checks before assuming the ice maker module is dead — most fixes are $0 to $40.
Most ice maker symptoms get diagnosed and fixed on the first visit. Flat $129 diagnostic — fully waived when you approve the repair.
Step-by-step
Top-mount and side-by-side: there's a wire arm (the bail) that has to be in the down position to make ice. Built-in: there's an on/off toggle on the ice maker itself. French-door with in-door ice: check the front-panel button.
Ice production stops above 5°F. Set the freezer to 0°F and let it run for 24 hours. If it can't hold 0°F, fix the freezer first — that's a separate problem.
Filters clog gradually — slow ice and small cubes are the early warning signs, no ice is the late one. Replace it every 6 months whether it looks bad or not. Use the OEM filter for your model — aftermarket filters are the most-common cause of slow ice on Samsung and LG.
Pull the fridge out. The water line is usually 1/4" copper or plastic running to a shutoff valve under the sink or in the basement. Confirm the valve is fully open. Check for kinks where the line wraps behind the fridge.
With the ice maker on and water connected, you can manually trigger a harvest cycle on most models — there's a small test button or hole on the front of the ice maker. Trigger it and watch: the arm should sweep, the cubes should drop, and water should fill the tray for ~7 seconds. No water = inlet valve or supply.
The inlet valve is at the back-bottom of the fridge. With power off, ohm out the solenoid coil — should read 200–500Ω depending on model. Open or shorted = replace the valve ($40–$80 part).
Stop and call
Safety + model triggers
Water leaking from the back of the fridge or pooling under the freezer after troubleshooting.
Inlet valve cracked or supply-line ferrule failed — risks flooding the kitchen.
Sub-Zero, undercounter Scotsman / U-Line / Marvel, or built-in column ice maker.
These have separate condensers and proprietary harvest mechanisms — generalist parts don't fit.
Ice maker module hums constantly or trips the GFCI when plugged in.
Module short — keep cycling it and you risk popping the fridge's main control board.
Other reasons to call
FAQs
First ice in 6–12 hours, full bin in 24–48 hours. If it's been more than 48 hours and you have less than half a bin, troubleshoot.
Low water pressure to the inlet valve — almost always a clogged water filter (most common) or a partially-closed shutoff valve. Replace the filter first.
Yes. A fully-clogged filter can drop the pressure below the ~20 psi the inlet valve needs to open. Most fridges will display a 'replace filter' indicator before this happens — don't ignore it.
Water filter: $50–$70 supplied. Inlet valve: $189–$280. Ice maker module: $250–$380. Our flat $149 fridge diagnostic is waived when you approve the repair.
Air in the line. Dispense 2 quarts of water through the door dispenser to purge the line. Ice production resumes in 6–12 hours.
Related service
Refrigerator ice makers, undercounter ice machines, and standalone Scotsman or U-Line units — we fix every kind. Same-day windows across the Twin Cities and Central MN with OEM parts on every truck and a flat $129 diagnostic that's waived when you approve the repair.
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