How to prevent build-up of limescale in the washing machine?

Issue

How to prevent build-up of limescale in the washing machine?
Descaling the washing machine

Applies to

washing machine (integrated and freestanding)
washer-dryer

Resolution

Why Limescale Is a Problem

When the heating element becomes coated with limescale, it can cause several issues:

Slower heating times – water takes longer to reach the desired temperature
Shortened lifespan of components – especially the heating element
Risk of breakdown – the heating element may fail completely
Potential damage to bearings – leading to costly repairs

How to Remove and Prevent Limescale

1. Descale Your Washing Machine Regularly

For optimal performance, use a dedicated descaling product to remove existing limescale deposits. Regular descaling helps maintain efficiency and prolongs the life of your appliance.

Follow the instructions provided with the descaler

We recommend specialized detergents available on our Webshop.

2. Understand Your Water Hardness

Limescale is caused by minerals found in hard water. The harder the water, the more deposits can form.

Water hardness levels can vary even within the same region
Supply sources may change depending on local demand
Contact your water supplier or local authority to check your area’s water hardness (°dH level)

3. Set a Descaling Schedule

How often you should descale depends on:

Water hardness level
Frequency of wash cycles

As a general guideline:

In hard water areas, descale more frequently
In softer water areas, less frequent descaling may be sufficient

Refer to your appliance manual or descaling product guidelines for a recommended schedule based on your local water hardness.

See the table for detailed guidance

Descaling frequency
Hardness in °F	Hardness in °e, °Clark	Hardness in °dH	Specifications for water hardness	< 2 wash cycles/day	2-4 wash cycles/day	> 4 wash cycles/day
0-7	0-5	0-4	Extremely soft	-	-	-
7-14	5-10	4-8	Soft	-	-	Once a year
14-21	10-15	8-12	Medium-hard	Every 6 months	Every 6 months	Every 6 months
21-32	15-22	12-18	Fairly hard	Every 6 months	Every 3 months	Every 3 months
> 32	> 22	> 18	Hard	Every 3 months	Every 2 months	Every month

Still need help? Get expert support

If the issue continues, a professional technician can help diagnose and fix the problem.

No matter if your appliance is in warranty, out of warranty, or covered by an appliance protection plan - we’ll guide you to the right service.

Book a repair online

Was this article helpful?

Spare parts & Accessories

Find original spare parts and accessories for your appliance in our webshop and have them delivered directly to your door.

To the webshop

Book a repair

Need to arrange a repair technician visit? Repairs under warranty are free of charge and we are here to support you after your warranty has expired. Authorised Technicians and genuine parts for complete peace of mind.