The short answer
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 RBM 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.
What you are actually seeing
- 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.
- A puddle on the floor at the front of the cabinet — Water at the front foot is where the base tray delivers it, not where it started. Treat the position as evidence that the machine is leaking and nothing more.
- NEAR MISS — Water inside but the cabinet has also gone warm — A cooling fault dumps melting ice into the cabinet. Fix the cooling problem and the water stops; that is a different page.
The ranking that matters here
- The water supply line or its fittings — Supply leaks give clean water, often at the back and often growing rather than coming and going. That pattern separates them from defrost water immediately. It leads because it explains more leaks than everything below it together, and confirming it needs no tools. Against the brand-wide ranking, the water supply line or its fittings has moved up past a blocked defrost drain on this platform.
- A blocked defrost drain — Every frost-free refrigerator melts ice on a schedule and sends the water down a small drain to a pan above the compressor. Food debris and ice plug that drain, and the water then goes wherever gravity takes 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 — It is easy to check at the same panel as the drain outlet, which is why it sits near the drain in this order.
Check in this order, and why
- First — check the supply line and its fittings at the back — Shut the house valve, pull the machine out and run a dry tissue over every fitting and along the line. Damp at a fitting means pressure is escaping continuously. Each check either finds the water or eliminates a whole source, which is why the sequence beats following the puddle.
- Second — look for water under the crispers and ice on the freezer floor — Both sit directly below where the defrost drain should have carried the water away, so either one confirms the drain without a tool being lifted.
- Third — switch the ice maker off for a day and watch — If the water stops with it, the fill system is the source. One switch and a day of patience removes an entire 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
Unplug the refrigerator or switch off its breaker before any panel comes off, and shut the house water valve before touching a supply fitting. A capacitor can hold a charge after the power is off. Water on a kitchen floor beside a powered appliance is a shock risk in its own right — mop it up before you start work rather than after.
When to call a technician
Book a visit once you know which family of leak you have and cannot reach the source. Say whether the water is clean or has been sitting, whether it appears on a schedule or continuously, and what you have already cleared — that decides which parts come on the van.
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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.
