---
title: "Dryer sensor and thermostat service"
description: "Cycles that stop after ten minutes with a dry load, or cycles that run hot and long with a damp one — both are the machine believing something untrue about"
url: "https://askomiami.support/services/dryer-sensor-and-thermostat-service/"
date_modified: "2026-09-13"
Appliance type: "Dryers"
---


# Asko dryer sensor and thermostat service

### Cycles that end too early and cycles that never end are one circuit

The moisture sensor bars inside the drum read conductivity, and fabric softener leaves a film on them that is invisible and quite enough to make the machine report a wet load as dry. That produces cycles that stop after ten minutes. The same circuit read the other way — a thermostat or a sensor that will not confirm temperature — produces cycles that run to the two-hundred-minute limit and stop. Which of the two you have decides the part, and on this make the code family depends on the control board rather than the model name.

What this involves

Sensor bars filmed with softener residue are the commonest cause by far

The code family depends on the control board, and we identify it first

A cycle that ends too early is the same circuit as one that never ends

Clean and test the sensor bars

Bars cleaned back to bare metal and their reading checked wet and dry. A film invisible to the eye is enough to end every cycle in ten minutes.

Read the thermostats in circuit

Cycling thermostat, thermal cut-out and the sensor the board actually uses, measured rather than swapped.

Confirm which code family this board uses

Because the same number belongs to different tables across the revisions of this platform, and the record is left with the machine for next time.

### Can I clean the sensor bars myself?

Yes, and it is worth doing quarterly. Two metal strips inside the drum, wiped back to bare metal with a little vinegar on a cloth. It costs nothing and it is the most common cause of this complaint.

### The machine stops and shows a code I cannot find.

Tell us the model with it. This platform changed its code form across revisions — L-numbers, then F-numbers, then S-numbers, then J1 and LCD strings — and the same number belongs to different tables on different boards.

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