The short answer
On the M family water inside the cabinet and water on the floor are two different faults. The first is a blocked defrost drain; the second is usually a supply connection. The brand-generic page runs them together and this one does not.
What you observe
- A sheet of ice on the floor of the compartment — Same fault caught later, once the pooled water has frozen.
- Water on the floor at the front — The cabinet floor slopes forward, so a rear leak arrives at the front.
- A crackle of ice under the drawers before any water appears — The early stage of a blocked drain, caught before the water reaches the floor.
- Water appearing a day or two after the unit was moved — A displaced drain pan or a strained supply connection rather than a drain fault.
- NEAR MISS - condensation on the outside of the doors — That is humidity and seal performance, not a leak.
Causes, most likely first on M
- Water supply connection or line — Ranked first on the M family: a small unit is moved more often than a built-in, and the line is strained every time. The table above is one platform, so a defrost or airflow weakness appears on every code in it rather than on one variant. This moves above blocked defrost drain, which leads the brand-generic order, because these models share one layout, so its weak point shows across the whole family.
- Blocked defrost drain — Second: a compact cabinet has a very short drain that a single piece of debris can close completely.
- Drain pan cracked or displaced — Third: the pan is the end of the drain path and is disturbed whenever the unit is moved, which makes a recent move the thing to ask about.
- Door seals and condensation — Fourth: a glass door on this class of unit condenses readily once the seal has taken a set.
- Ice maker fill valve or its tubing — Last: last, and only relevant where a module is fitted, but a weeping fill valve leaks steadily rather than in step with the defrost cycle.
Check in this order, and why
- Empty the compartment and find the drain opening — It is the likeliest cause and it is visible once the shelves are out.
- Flush the drain channel with warm water — It confirms the diagnosis and clears most blockages in one step.
- Check the cabinet is level and tilted very slightly back — A cabinet leaning forward sends melt water towards the door instead of the drain.
- Test the seals with a sheet of paper around each door — Last, because it explains condensation rather than standing water.
Before you open anything
Safety
Isolate at the breaker before any panel comes off, and leave the sealed system alone entirely: refrigerant work is licensed work and the tools for it are not owner tools.
When to call a technician
Shut the supply at the stop tap the moment a supply-side leak is confirmed. Clearing a drain and testing seals are owner work; a valve, a heater at the drain or a cracked pan is a service call on this family.
Other M pages
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