The short answer
Ice problems on a Cosmo refrigerator divide sharply: either the ice maker is not getting water, or the freezer is not cold enough to harvest. Check the supply and the freezer temperature before touching the module, because those two account for almost every complaint and both are owner checks.
What you are actually seeing
- No ice at all and an empty mould — Means: on-page
- The mould fills but never releases the cubes — Means: on-page
- Cubes are small, hollow or misshapen — Means: on-page
- Ice tastes or smells of the freezer contents — Means: on-page
- Ice production stopped after the cabinet or the plumbing was moved — Means: on-page
- Water on the floor at the back rather than a lack of ice — Means: different-fault — Go to: cosmo-refrigerator-water-leak
- The whole freezer is warm — Means: different-fault — Go to: cosmo-refrigerator-cooling-failure
- Body: Match what you see before you take anything apart. No ice at all and an empty mould. The mould fills but never releases the cubes. Cubes are small, hollow or misshapen. Ice tastes or smells of the freezer contents. Ice production stopped after the cabinet or the plumbing was moved. Some near-miss symptoms belong on a different page: Water on the floor at the back rather than a lack of ice points at the supply connection, covered on cosmo-refrigerator-water-leak; The whole freezer is warm points at a cooling fault, covered on cosmo-refrigerator-cooling-failure.
Causes, ranked for this machine
- The supply valve is closed, or the ice maker arm or switch is in the off position — Why this rank: First because it is free, extremely common after any work near the cabinet, and it produces a completely empty mould
- A freezer that is not cold enough to complete a harvest cycle — Why this rank: The module will not release ice until the mould reaches temperature, so a marginal freezer produces no ice with no fault at all
- A kinked or frozen supply line behind the cabinet — Why this rank: Small hollow cubes point at restricted flow, and a line pinched when the cabinet was pushed back is the classic cause
- A blocked water filter, where one is fitted — Why this rank: Restricts flow gradually, which matches cubes that have got smaller over months
- A failed inlet valve or ice maker module — Why this rank: Last because it needs a part and everything above it is free to rule out
- Body: Ranked for a household refrigerator with an electronic control, forced-air cooling shared between the compartments, an automatic defrost cycle and a condenser at the base. Most likely: The supply valve is closed, or the ice maker arm or switch is in the off position. First because it is free, extremely common after any work near the cabinet, and it produces a completely empty mould. Next most likely: A freezer that is not cold enough to complete a harvest cycle. The module will not release ice until the mould reaches temperature, so a marginal freezer produces no ice with no fault at all. Third: A kinked or frozen supply line behind the cabinet. Small hollow cubes point at restricted flow, and a line pinched when the cabinet was pushed back is the classic cause. Fourth: A blocked water filter, where one is fitted. Restricts flow gradually, which matches cubes that have got smaller over months. Fifth: A failed inlet valve or ice maker module. Last because it needs a part and everything above it is free to rule out.
What to check, in order
- Check the ice maker arm or switch is in the on position
- Trace the supply line to its valve and confirm it is fully open
- Put a thermometer in the freezer and read it after several hours
- Check the water filter age and the supply line for a kink
- Body: Each check rules out the causes above it. First, check the ice maker arm or switch is in the on position. Second, trace the supply line to its valve and confirm it is fully open. Third, put a thermometer in the freezer and read it after several hours. Fourth, check the water filter age and the supply line for a kink.
Checks you can safely make yourself
- Open the freezer and check the ice maker arm is down, or the switch is on, according to the markings — Tools: torch — Time estimate: a few minutes
- Trace the water line from the back of the cabinet to its shut-off valve and confirm the valve is fully open — Tools: torch — Time estimate: a quarter of an hour
- Place a thermometer in the freezer and read it after several hours against the 0 °F (−18 °C) target — Tools: freezer thermometer — Time estimate: several hours
- Pull the cabinet forward carefully and look at the supply line for a kink or a crushed section — Tools: torch — Time estimate: half an hour
- Change the water filter if one is fitted and it has not been changed recently, then allow time for production to resume — Tools: replacement filter — Time estimate: half an hour plus a day
- Body: Checks an owner can make with the cabinet unplugged or simply observed. Step one: Open the freezer and check the ice maker arm is down, or the switch is on, according to the markings. Tools: torch. Time: a few minutes. Step two: Trace the water line from the back of the cabinet to its shut-off valve and confirm the valve is fully open. Tools: torch. Time: a quarter of an hour. Step three: Place a thermometer in the freezer and read it after several hours against the 0 °F (−18 °C) target. Tools: freezer thermometer. Time: several hours. Step four: Pull the cabinet forward carefully and look at the supply line for a kink or a crushed section. Tools: torch. Time: half an hour. Step five: Change the water filter if one is fitted and it has not been changed recently, then allow time for production to resume. Tools: replacement filter. Time: half an hour plus a day.
Safety first
Safety
Unplug the cabinet before pulling it out or working behind it, and close the water supply valve before disconnecting anything. Never use a hot air gun or boiling water to thaw a supply line, and do not move a loaded cabinet alone. A refrigerator holds food safely at 40 °F (4 °C) or below. Unplug the appliance or switch off its breaker before removing any panel. A capacitor can hold a charge after the power is off. fridge-40f unplug-before-service
Where the owner fix ends
Call a technician when the arm or switch is on, the supply valve is open, the line is unkinked, the filter is fresh and the freezer holds 0 °F (−18 °C), and there is still no ice. The remaining causes are the inlet valve and the ice maker module, which sit behind panels with mains terminals.
Nearest pages of the same kind
Generalized information
This page is generalized across the Cosmo refrigerator line. French-door, bottom-freezer and top-freezer cabinets, and freestanding and built-in installations, share the ranking above but not every part, and this page does not cover a specific model or control revision. Family- and model-specific pages, where they exist, are linked below.
Links: - [Common COSMO Refrigerator Problems](/blog/cosmo-refrigerator-problems) - [COSMO Refrigerator: Abnormal Noise or Vibration](/blog/cosmo-refrigerator-abnormal-noise) - [COSMO Refrigerator: Controls, Display or Error Code](/blog/cosmo-refrigerator-control-fault) - [COSMO Refrigerator: Not Cooling or Not Freezing](/blog/cosmo-refrigerator-cooling-failure)
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
