---
title: "Defrost system repair"
description: "Ice building where air should move — on the back wall of a compartment, around a fan, or as a slab under a drawer. The circuit is small and predictable:"
url: "https://askomiami.support/services/defrost-system-repair/"
date_modified: "2026-09-13"
Appliance type: "Freezers, Refrigerators"
---


# Asko defrost system repair

### How fast the ice comes back names the part

The circuit is small and predictable — a heater, a sensor, a control and a drain path — and which of the four it is can usually be told from the interval rather than from a meter. Ice returning within days points at the heater or its sensor; a month or more points at a door left off its catch or at humidity getting in, which is a habit rather than a component. That question is worth asking before the visit, because it changes what goes on the van. The drain is always followed all the way to the tray, since a blocked one refreezes into an identical complaint.

What this involves

How quickly the ice returns after clearing tells us which part it is

Heater, sensor, control and drain — a short list, worked through in order

A door left ajar produces identical ice and is not a repair

Clear it and time the return

The compartment defrosted properly, then the interval to the next build recorded. Days point at the circuit; weeks point at a door or at humidity.

Test the circuit cold

Heater continuity, sensor curve and the control's own timing, measured at temperature rather than at room warmth where a marginal part reads as healthy.

Clear and prove the drain

Channel flushed and the water followed all the way to the tray, because a blocked drain refreezes into exactly the same complaint.

### Can I just defrost it myself?

You can, and it is worth doing to get the interval. Clear it properly, then note how long before the ice comes back — that number is the diagnosis and only you can measure it.

### Does this happen more here?

Yes. Every door opening in summer admits air near saturation, and the defrost circuit has to deal with all of it. A marginal door seal turns that from a load into a problem.

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