Why Refrigerators Leak
Refrigerators with ice makers and water dispensers have a water supply line — typically a thin copper or plastic line running from a valve under the sink or behind the unit. This line can develop pinhole leaks, loose connections, or crack over time. The most common cause of refrigerator flooding is the water supply line failure. Other causes include a clogged defrost drain that causes ice buildup and overflow, a failing door seal, and condensation from poor door sealing.
Preventing Refrigerator Leaks
- Replace plastic or copper supply lines with braided stainless steel lines
- Inspect the supply line connection annually when moving the refrigerator to clean behind it
- Install a water leak detector behind the refrigerator
- Clean defrost drain annually — pour warm water through the drain tube to clear ice and debris
- Inspect door gaskets and replace if cracked or not sealing properly
Damage From a Refrigerator Leak
Slow refrigerator leaks are insidious because they often go undetected for months. Water seeps under the flooring, into the subfloor, and into the cabinet space beside the refrigerator. By the time the leak is noticed, significant mold growth and subfloor damage may have occurred. Check under and behind your refrigerator regularly and replace aging supply lines proactively.
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