---
title: "Water leaking from the unit"
description: "Sub-Zero water leaking from the unit: water inside the cabinet, under a drawer, or on the floor in front."
url: "https://subzeromiami.support/symptoms/water-leaking/"
date_modified: "2026-08-18"
Appliance type: "Built-in refrigerators, Undercounter & drawers"
---


# Sub-Zero water leaking from the unit

### The fastest diagnosis is the code

A water-system code names the valve or the check valve directly, which saves a lot of looking. If the display has one, that is the place to start.

### Three sources, three different jobs

- **The defrost drain.** Blocked or frozen, so meltwater goes into the cabinet instead of down. Common, and usually not expensive.
- **The water line or valve.** Anything from a filter housing to a check valve — this is the one that reaches the floor and the cabinetry.
- **Condensation.** A seal that is not sealing, on a humid coast, produces water that looks like a leak and is really a door problem.

### Why it matters more in a built-in

A freestanding unit leaks onto a floor somebody sees. A built-in leaks into the cabinetry it is fitted into, and the first sign is often the kickplate or the floor at the edge of the run. If you have water anywhere near a built-in unit, it is worth looking at sooner rather than at the weekend.

Inside, or on the floor

What it usually means

Water pooling in the bottom of the cabinet

A wet floor in front of the unit

Ice in the drain or under a drawer

The fastest diagnosis is the code

A water-system code names the valve or the check valve directly, which saves a lot of looking. If the display has one, that is the place to start.

Three sources, three different jobs

The defrost drain. Blocked or frozen, so meltwater goes into the cabinet instead of down. Common, and usually not expensive.

The water line or valve. Anything from a filter housing to a check valve — this is the one that reaches the floor and the cabinetry.

Condensation. A seal that is not sealing, on a humid coast, produces water that looks like a leak and is really a door problem.

Why it matters more in a built-in

A freestanding unit leaks onto a floor somebody sees. A built-in leaks into the cabinetry it is fitted into, and the first sign is often the kickplate or the floor at the edge of the run. If you have water anywhere near a built-in unit, it is worth looking at sooner rather than at the weekend.

A blocked or frozen defrost drain

Meltwater going into the cabinet instead of down it. Water pooling inside rather than on the floor points here. Common, and usually not expensive.

Condensation that looks like a leak

On a humid coast a seal that is not sealing produces water that reads as a leak and is really a door problem. Worth ruling out before anything is opened.

The water line, valve or filter housing

This is the one that reaches the floor and the cabinetry. If the water is clean and continuous, shut the supply off at the valve before anything else.

The ice maker

Check whether it is involved before you call — a leak that stops when the ice maker is switched off has told you where it is.

Shut the supply off if the water is clean and continuous

The shut-off is usually under the sink or behind the unit. A built-in leaks into the cabinetry rather than onto a floor somebody sees.

Look at where it is pooling

Inside the cabinet points at the defrost drain. On the floor in front points at the water line or the valve. That single observation halves the diagnosis.

Check whether the ice maker is involved

A leak that stops when the ice maker is switched off has told you where it is, and it costs nothing to find out.

Then book the visit

Photograph any code and say where the water is appearing. Water near a built-in unit is worth looking at sooner rather than at the weekend.

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**[Read full article: Water leaking from the unit](https://subzeromiami.support/symptoms/water-leaking/)**