When an ice maker stops working, the cause is almost always one of five things: a frozen fill tube blocking water from reaching the ice maker, a failed water inlet valve, a water filter past its lifespan choking flow, a shut-off arm or sensor stuck in the off position, or a failed ice-maker module itself. Most repairs are a 30-minute visit.
When the ice maker stops producing ice, the cause is almost always one of five things: a frozen fill tube blocking water from reaching the ice maker, a failed water inlet valve, a water filter past its lifespan choking flow, a shut-off arm or sensor stuck in the off position, or a failed ice-maker module itself. Diagnose in this order — most fixes are a 30-minute visit and the parts are in stock on every common brand.
How an ice maker actually works
An automatic ice maker is a small motorized assembly that lives inside the freezer compartment. On a roughly 90-minute cycle, the inlet valve at the back of the fridge opens for 7–10 seconds and pushes a measured slug of water through a fill tube into the ice mould. The water freezes solid (helped by the freezer's normal cold temperature). When a thermostat in the mould detects the ice is frozen through, an ejector arm rotates and pushes the cubes out into the bin below. The shut-off arm or infrared sensor checks whether the bin is full; if it is, the cycle pauses until cubes are removed.
Five places along that chain can fail. The order in the howto steps above is the order we'd diagnose on a service call — cheapest test first, expensive parts last.
The single most common cause: water filter past expiry
If you didn't know your fridge had a water filter, this is probably your problem. Filters cost less than the service call to come tell you to change them, and they're rated for 6 months of normal use. Past that, the filter media compacts and chokes the flow rate to a trickle — not enough to fill the ice mould properly, so cubes come out hollow, small, or stop entirely.
Look inside the top of the fresh-food compartment for a cylindrical cartridge, or behind the kick-plate at the bottom front. Note the model number printed on it (Whirlpool W10295370A, LG ADQ73613401, etc.) and order a replacement online or pick one up from any appliance-parts store. Genuine OEM filters are best for water taste; third-party filters from reputable brands (Pure-Plus, Tier1, Glacier) are 30–50% cheaper and perform almost identically for ice production.
After installing, run 2–3 gallons of water through the dispenser to flush the carbon dust that comes off a fresh filter. Then wait 90 minutes for the next ice-maker cycle and see if cubes return to normal size.
The second most common cause: frozen fill tube
The fill tube is a small white plastic tube that runs from the inlet valve up the back of the freezer to the ice maker. It carries the water for each fill cycle. If even a single fill cycle delivers slightly too much water (filter restriction, valve sticking briefly), some water can dribble back down the tube and freeze. After several cycles, the tube is fully blocked.
The thaw is a 5-minute job with a hair dryer on its lowest setting held 6 inches from the back of the ice-maker housing. Don't aim it at the surrounding plastic walls (they'll deform). Once the tube is clear, the ice maker should produce a full batch on the next cycle.
The fix is also the warning sign. If the fill tube freezes again within a few weeks, the underlying problem is upstream — usually a partially failed inlet valve dripping water between cycles, or a flow-restricted filter. Replace the filter and watch for recurrence; if it happens again, the inlet valve is next.
When to call instead
Three situations where the DIY route runs out:
- You've replaced the filter and thawed the fill tube and the maker still won't run. The inlet valve, ice-maker module, or main control board is the issue. Inlet-valve testing requires a multimeter; module testing requires a paper clip and knowledge of brand-specific test points.
- The freezer is producing ice cubes that are tinted, smell off, or taste bad. This isn't a mechanical fault — it's a water-quality issue (filter past expiry, biofilm in the dispenser line, or the city water itself in older parts of the GTA). We can run a system flush; you can also try a vinegar cycle yourself first.
- Water is leaking somewhere along the supply chain. Don't keep running an ice maker that's leaking — water reaches electrical components inside the freezer faster than you'd think. See our refrigerator leaking water guide for the diagnostic steps.
Local context for the GTA
The single biggest predictor of ice-maker problems in the GTA is water hardness. The Toronto and Peel water-supply zones average 6–8 grains per gallon (moderately hard); York Region averages 10–15 grains per gallon (hard); rural-well properties in north Durham and west Halton run harder still. Hard water shortens filter life — six-month-rated filters are realistically 4-month filters in York Region — and accelerates inlet-valve failures from mineral build-up on the plunger.
If you're in Stouffville, Uxbridge, Newmarket, Aurora, or anywhere on rural well water, set a calendar reminder to swap the filter every 4 months instead of 6, and expect to replace the inlet valve every 5–7 years. Both are cheaper than the consequential damage from a leak.
Call 416-436-3182 or start a chat with the brand and approximate age — most ice-maker calls in the Toronto core and inner suburbs get a tech the same day.
Frequently asked questions
How long should an ice maker take to make ice from empty?
About 90 minutes for the first batch after restart. A working ice maker produces 2–3 cubes per cycle and runs roughly one cycle every 90–180 minutes — so a full bin (about 100 cubes) takes 1.5 to 2 days from completely empty. Faster than that means the ejector cycle is short-cycling; slower means a flow restriction is starving the fill cycle.
Why is my ice maker making hollow or small cubes?
Almost always a flow restriction in the water supply. Most common cause: a water filter past its 6-month lifespan. Second most common: a partially frozen fill tube that's letting some water through but not a full cup per cycle. Third: a failing inlet valve with sticky internal screens. Replace the filter first — that's the cheapest test.
Should I empty an ice maker that hasn't been used for months?
Yes — and run a fresh batch through. Ice in a long-idle bin absorbs flavours and odours from the freezer, and the cubes can fuse into one solid block as they sublimate slightly between cycles. Dump the bin, run a vinegar-water cycle through the dispenser if you have one, and let the maker produce 2–3 fresh batches that you also discard before using ice for drinks.
How much does it cost to repair an ice maker?
Inlet valve and ice-maker module replacements are typically a quick visit plus the part. Frozen fill tube thaws are a quick service call with no parts. Total cost depends on which fault and which brand — we'll quote firm before any work starts. No call-out fee on booked repairs.
Is it worth fixing an ice maker on an old fridge?
Depends on the rest of the unit. If the fridge is 8–10 years old and otherwise reliable, an ice-maker module replacement is well below the 50% rule threshold. If the fridge is past 13 years and has had other recent failures, putting money into the ice maker is throwing good money after bad. We'll tell you honestly when you call.