---
title: "Defrost system repair"
description: "Frigidaire defrost system repair: frost where there should be none, a coil in a block of ice, or a cabinet that cools for a few days after every service call…"
url: "https://frigidairemiami.support/services/defrost-system-repair/"
date_modified: "2026-09-09"
---


# Frigidaire defrost system repair

### Ice is evidence, and it is worth photographing

A coil in a block of ice tells us how the system failed and roughly when. On these cabinets the defrost job is done by three cheap parts — a heater, a bimetal thermostat and a timer or control that decides when — and each of them fails in a way the ice pattern records. Frost climbing evenly up the rear panel is a different failure from a solid slab at the bottom of the compartment. Which is why we would rather you did not empty and thaw it before we arrive: a defrosted freezer has thrown the evidence away.

What this involves

Heater, thermostat or sensor, and the control that decides between them

This climate loads the defrost circuit harder than the design assumed

A blocked drain is part of the same system and is checked in the same visit

Look at the coil before anything is replaced

The pattern of frost on the evaporator says whether the heater ran, ran partly, or never ran at all. That single look decides most of this job.

Test the heater and its safety device

Continuity and resistance on both, cold. A defrost thermostat that has failed open leaves a perfectly good heater doing nothing.

Prove the control actually calls for defrost

Timer, board or adaptive control, depending on the cabinet. Forcing a cycle is how this is confirmed rather than assumed.

Clear the drain while the panel is off

Meltwater that cannot leave refreezes into the same block next week. This is the step that stops the call coming back.

Refit and measure over an hour

The cabinet is left running and checked, because a defrost repair that is not verified is a second visit waiting.

### Should I defrost it before you come?

Please do not. A cabinet cleared and dried overnight will run normally for a day or two and then fail again the same way, which turns one visit into two. Photograph the ice, leave it alone, and keep the door shut.

### It cools fine for a few days after I clear the ice, then stops again. Why?

Because clearing the ice treats the symptom. Every defrost cycle that does not happen adds frost to the coil until the airflow chokes again, and the interval between failures is a measurement of how completely the defrost circuit has stopped working.

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**[Read full article: Defrost system repair](https://frigidairemiami.support/services/defrost-system-repair/)**