Why do refrigerator water lines leak?
Usually the supply line. IBHS research cited by Connecticut's insurance department found 73% of ice maker losses came from a supply line failure, and 10% involved new refrigerators, mostly from improper installation (Connecticut Insurance Department). IBHS adds that connections can loosen when the fridge is moved and defrost drains can clog (IBHS).
Why is fridge leak damage so often hidden?
Because the water runs under the fridge and the flooring. IBHS warns that a slow, unseen leak can damage subflooring (IBHS). A meter check also helps: EPA WaterSense suggests reading the water meter before and after two hours with no water use (EPA WaterSense).
What should I do when I find it?
Close the valve for the fridge line, often under the sink or behind the fridge, or the main. Pull the fridge out carefully, photograph the floor and the line, and dry the area. The EPA says to dry water-damaged areas and items within 24 to 48 hours to prevent mold growth (EPA).
Will insurance cover it?
A line that snaps is a sudden loss. Washington's insurance commissioner lists an ice maker line that snaps as an example of sudden water damage most policies cover (Washington OIC). A slow drip over weeks is often treated as gradual.
Common questions
Is a plastic fridge line a problem?
Braided stainless steel lines are a common upgrade. Check the line whenever the fridge is moved.
Can a fridge leak cause mold?
Yes, if water sits under the fridge or the flooring. Hidden leaks give mold time to grow.
How do I check for a hidden leak?
Turn off all water use and watch the meter for two hours. If it moves, something is leaking.
Related guides
Sources
- Connecticut Insurance Department: preventing water damage (IBHS study facts)
- IBHS: how to prevent interior water damage from plumbing and appliances
- EPA WaterSense: Fix a Leak Week
- Washington Office of the Insurance Commissioner: leaks, water damage and mold
- EPA: A Brief Guide to Mold, Moisture and Your Home
Last reviewed November 13, 2026. This guide is general information, not legal, insurance or medical advice.