The short answer
Start with the ice maker module or its ejector: on a Thomson refrigerator showing an ice maker that has stopped or slowed, that outranks everything else here, and a frozen fill tube comes a long way behind it. On a long-serving machine the ranking follows its history rather than its badge: ask how many times it has been moved and re-connected, because each installation is a joint that can be the fault. The first 2 checks need no tools and no panel off, and the point where owner work stops is marked below.
What you are seeing
- The cubes are small, hollow or misshapen — Water is arriving but not enough of it, which points at restriction rather than a stoppage.
- The cubes are fused into one block — That is air and frost rather than a water fault, and it usually means the mould has been standing too long.
- NEAR MISS — the whole compartment is warm — Ice is the first casualty of a cooling fault. If food is softening too, this is not your page.
Causes, most likely first on Thomson
- The ice maker module or its ejector — A failed module is easy to recognise and hard to misread: the mould is full of good ice that is not being ejected, which is a completely different picture from a mould that never filled. Top of the list on Thomson: the evidence is reachable without tools, and finding it ends the diagnosis.
- The water supply line and its shutoff — Every ice maker fault begins at the tap that feeds it, and that tap is behind the machine where it gets nudged when the unit is pulled out and pushed back. Second on Thomson: it gives the same picture as the cause above and is separated from it by one free test.
- The water inlet valve — The valve is the electrical end of the water path and it fails in a particular way: it passes less each year as its screen silts up, so the fault arrives gradually rather than all at once. Ranked third because it needs the two above cleared before any reading from it can be trusted.
- A frozen fill tube — A plugged fill tube is the classic repeat offender: it clears with warm air and comes back if the cause of the overfill is still there. Ranked last, and the order matters most right here: this is the one item that changes what the repair costs.
The order to work in
- First: Look at whether the mould is full of ice or empty — It is first.
- Second: Trace the water line from the tap to the back of the machine — It comes second because it is the cheapest check that can end the diagnosis, and it rules out the whole water path at once.
- Third: Listen for the fill buzz at the back of the machine — Last in the order because a valve can only be judged fairly once the line into it is known to be open.
What an owner can safely check
- Trace the supply line and open the shutoff fully — Follow the line from the tap to the machine, straighten any kink, and turn the shutoff fully open rather than part-way.
Tools: torchAbout 10 min
- Thaw the fill tube with a warm cloth or a hair dryer on low — Work from outside the tube, never inside it, and keep the heat moving. Dry the area afterwards.
Tools: hair dryer, clothAbout 20 min
- STOP HERE if the next step needs a meter on live terminals — Everything past this point needs test equipment and an appliance that is open. Call from here.
Before you open anything
Safety
Isolate the machine at the wall or the breaker before a panel comes off. Unplug the appliance or switch off its breaker before removing any panel. A capacitor can hold a charge after the power is off. Leave the sealed system alone — refrigerant is licensed work — and never wedge a door switch to keep a fan turning while you look.
When this becomes a service call
Stop at the first step needing a meter on live terminals, and call from there. Anything on the sealed system — refrigerant, the compressor, the tubing — is licensed work, and a machine that has been opened is a machine that needs a technician. Call sooner if the fault is getting worse rather than staying the same, because a cheap cause left alone is how an expensive one arrives.
Nearest pages of this class
What this page does not cover
Read this as the class-level answer for Thomson refrigerators rather than as a page about one product line. Nothing narrower is published for this brand and appliance yet, so there is nothing to link down to; once there is, that page takes precedence over this one. Deliberately absent: part numbers, torque figures and wiring colours.
