247homecaresucure make a statement of fact regarding manufacturers' warranties...

Its spokesperson said,

"The terms and conditions that accompany your boiler's warranty must always be followed to maintain your warranty coverage.

"Ref: https://247homerescue.co.uk/blog/boiler-warranty/

The statements below are direct from the manufacturer's warranty and can be read in full by clicking the links below.

Worcester Bosch Warranty & Guarantee.

4.2.7 Damage to the Product as a result of water quality or other external factors causing scale, sludge, blockages or associated costs of rectification.

https://www.worcester-bosch.co.uk/guarantee-terms-and-conditions

Baxi Warranty & Guarantee.

9. Any damage caused by hard water scale deposits or sludge resulting from corrosion.

https://www.baxi.co.uk › faqs › gen...
General boiler warranty information

Still need to know more? Here's more about our Home Heating Test Kits.

Vaillant Warranty & Guarantee.

15. If any failure is caused by contaminated water in the boiler (e.g. blockages, or influences of flux residues, iron oxides, limescale, sludge etc.) the engineer’s visit becomes chargeable at the prevailing rates.

https://www.vaillant.co.uk/technical-pages/terms-and-conditions/

Ideal Boiler Warranty & Guarantee.

d. To de-scaling or other work required as a result of hard water scale deposits or from damage caused by aggressive water or sludge resulting from corrosion. Indications that such work may be required include a noisy boiler, cold spots on radiators, sludge in pipes and poor circulation of the central heating system.

https://idealheating.com › I...PDF

Viessmann Warranty & Guarantee.

To be clarified.

Glow Worm Warranty & Guarantee.

15. If any failure is caused by contaminated water in the boiler e.g. blockages, or influences of flux residues, iron oxides, limescale, sludge etc. the engineer’s visit becomes chargeable at the prevailing rates.

https://www.glow-worm.co.uk/homeowner/repairs-and-servicing/guarantee/guarantee-terms-and-conditions-223455.html

FQAs

What evidence may manufacturers ask for during a boiler warranty claim?

Boiler manufacturers may ask for evidence that the heating system has been installed, serviced and maintained in line with their requirements.
This may include service records, benchmark documentation, water treatment information and evidence that the heating system water has been cleaned, treated and maintained appropriately.

Can poor heating system water quality affect a boiler warranty?

Poor heating system water quality may affect warranty support if it contributes to component damage or if the system has not been maintained in line with manufacturer guidance.
Manufacturers commonly expect heating systems to be cleaned, treated and protected appropriately, especially when a new boiler is installed.
Testing can help provide evidence of water quality, inhibitor protection and water balance over time.

How can testing help after a professional heating system clean?

Testing before and after cleaning can help show how the condition of the system water has changed.
A first test can help identify the starting condition. A follow-up test after cleaning can help show whether water quality, inhibitor protection and water balance have improved.
This provides useful before-and-after evidence rather than relying on guesswork alone.

Will adding my own chemicals affect my boiler warranty?

Using the wrong chemical, adding too much, adding too little or treating the system without understanding the water condition may affect system performance and could create warranty concerns.
It is important to follow manufacturer guidance and use appropriate water treatment products correctly.
Testing first can help you understand whether inhibitor, cleaning or further investigation may be relevant before adding chemicals.

Should radiators be flushed when replacing a boiler?

When replacing a boiler, the existing heating system should be assessed, cleaned and treated in line with the boiler manufacturer’s requirements and recognised industry guidance.
Old radiators and pipework can contain sludge, debris or poor-quality system water. If this is not addressed, it may affect the new boiler and reduce long-term system protection.
Testing can help create a clearer record of system condition before and after work is completed.

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