---
title: "Mold in the Refrigerator Drip Pan: Where It Grows and How to Clear It"
description: "Mold in refrigerator drip pan: why the smell is under the machine rather than inside it, how to clear the defrost drain."
url: "https://fisherpaykelmiami.support/blog/mold-in-refrigerator-drip-pan/"
date_modified: "2026-08-26"
Category: "Safety & Risks"
---


# Mold in the Refrigerator Drip Pan: Where It Grows and How to Clear It

## Mold in refrigerator drip pan: the smell is usually not inside

Every article about a smelly refrigerator tells you to wipe the shelves and put baking soda in it. That is worth doing and it is not where the smell is coming from, which is why people do it, wait a week, and find nothing has changed.

:::

## Where the water comes from

A frost-free refrigerator does not stay frost-free by magic. Frost builds on the evaporator behind the back wall, and on a cycle a heater melts it off. That water has to go somewhere.

It runs down a channel at the back of the compartment, through a **narrow drain tube**, and out into a **shallow pan** near the compressor. The pan is not plumbed to anything. It is designed for the water to evaporate, helped by the warm air moving over it while the compressor runs.

:::

In a dry climate that works perfectly. In South Florida — a warm kitchen, humid air for eight months of the year, and a machine that runs a great deal — the pan often does not empty as fast as it fills.

A shallow pan of standing water, at body temperature, in the dark, beside a warm compressor. It would be surprising if nothing grew in it.

## The two jobs, in order

**One: clear the drain line.** Food debris and slime from inside the compartment travel down it, which both blocks it and feeds whatever is in the pan.

- Empty the bottom shelf and find the drain opening — usually a small hole or a channel in the middle of the rear wall, low down, sometimes under a cover.- Clear the visible opening with a soft brush.- Flush warm water through it — a turkey baster or a squeeze bottle is ideal — and listen for it arriving underneath.- If it will not flow, a length of small-diameter flexible tubing worked gently down the line clears it. Gently: the tube is soft plastic and a wire will go through it.

**Two: empty and wash the pan.**

- On a **freestanding** machine, the pan is usually behind the kickplate at the front, or reachable from the back. Pull it out level — it is full of water.- Wash it with warm soapy water, rinse it, dry it, and put it back seated properly.

Do not pour bleach down the drain line. It meets aluminum and soft plastics on the way and does nothing that warm water and a brush do not. Clean the pan first, then disinfect the pan if you want to — not the line.

## What is different on a built-in column

This is the part almost no article mentions, and on this maker it matters, because every freezer and wine cabinet in the line is integrated and so are twenty-four of the fifty-one refrigeration models.

On an integrated machine there is no kickplate to pull off and no back to reach. The pan is behind the plinth or requires the appliance to come forward out of the opening it was fitted into — with a cabinet panel to remove and a water line and electrical connection behind it.

That is why this job goes undone on exactly the machines where it matters most, and why it belongs on a maintenance visit rather than on a Saturday.

## How to know it is the pan

- **Empty the interior and clean it properly.** Leave it a day.- **If the smell returns with the machine empty**, it is not the food.- **Get low, at the front, with the compressor running.** A drip pan smell is stronger near the floor and stronger when the machine has been running, because the warm air over the pan is what carries it into the room.

## The other thing this fixes

A blocked drain does not only smell. It backs up, and then you get **water in the bottom of the refrigerator** — which arrives as "my refrigerator is leaking" and is one of the commonest calls that turns out not to be a leak at all.

Same job, approached from the other end, and it costs nothing but ten minutes.

---

**[Read full article: Mold in the Refrigerator Drip Pan: Where It Grows and How to Clear It](https://fisherpaykelmiami.support/blog/mold-in-refrigerator-drip-pan/)**