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Water under a refrigerator is usually defrost water that has not reached its drain, not a supply leak. The blocked drain is the common answer, and the puddle position tells you far less than most people assume. Across the TMF line the base tray channels any escaping water toward the front, which is exactly why the position of the puddle is weak evidence about the source on these models.
Where the water shows up
- Water running down the inside back wall — A wet rear wall is usually the machine’s own water taking the wrong route, not a plumbing failure.
- A wet patch only after the ice maker fills — Wet patches that follow an ice-maker fill rather than a defrost schedule point at the supply side, and switching the ice maker off for a day proves it.
- Damp or buckling flooring in front of the machine — A slow leak that has been running for a long time. The source matters less than getting it stopped.
- Water in the drain pan overflowing at the back — Water spilling from the drain pan is usually a symptom of something upstream sending too much down, not a fault in the pan itself.
- NEAR MISS — Water inside but the cabinet has also gone warm — Water inside a cabinet that has also gone warm is melting food, not a leak. Fix the cooling fault and the water stops.
The ranking that matters here
- The water supply line or its fittings — The line feeding the ice maker and dispenser is under house pressure whenever the valve is open, so a loose compression fitting or a split line leaks continuously rather than in cycles. It goes first because if it is not this, the remaining list is short and much easier to work. That is the departure from the brand-wide order: the water supply line or its fittings goes ahead of a blocked defrost drain on the TMF models because it is visible without moving the machine.
- A blocked defrost drain — This single fault explains most interior water. The giveaway is water under the crispers or ice on the freezer floor, both of which sit directly below where the drain should have taken it.
- The ice maker fill system overfilling or misaligned — A fill valve that does not close cleanly, or a fill tube pointing slightly off the mould, puts water where ice was meant to be and it runs out of the compartment.
- The drain pan cracked, dislodged or overflowing — An overflowing pan is often a symptom rather than a cause: something is sending more water down than the defrost system normally produces.
Check in this order, and why
- First — check the supply line and its fittings at the back — With the machine pulled out and the house valve shut, run a dry tissue around each fitting and along the line. Clean water at a fitting is a supply leak and it will not stop on its own.
- Second — look for water under the crispers and ice on the freezer floor — Take the bottom drawers out and look underneath, then look at the freezer floor. Water or ice at either point sits directly below the drain that should have taken it.
- Third — switch the ice maker off for a day and watch — Turn the ice maker off and give it a day. Water that stops with it came from the fill system, and that removes a whole branch of the list.
- Fourth — find the drain pan above the compressor and look at it — Look at the pan and how fast it refills after emptying. Both facts say something about what is happening upstream.
Power off before panels come off
Safety
Disconnect the power before reaching behind the grille, and close the supply valve before disturbing the line. Wet hands, a metal chassis and a live compressor circuit are a bad combination, and a supply line under pressure can empty a great deal of water into a kitchen very quickly.
When to call a technician
Call when the drain will not clear from the freezer side, when a supply fitting keeps weeping after being tightened, or when water has been running long enough to reach flooring or a cabinet carcass. Those are the cases where speed is worth more than saving a visit.
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Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
