Can you transfer a boiler warranty to a new owner?

What the manufacturers actually say

Baxi states it directly on its published boiler warranty information page: “Yes – if you move house, as long as the warranty was registered, the boiler warranty will stay with the boiler.” It adds the condition in the very next line: “However, the new owner must ensure the boiler is serviced annually, so that the warranty remains valid.” The guarantee is not something the seller packs and takes away. It is attached to the appliance on the wall.

Worcester Bosch comes at it from the other end. Its terms say “Only the owner of the Product can make a claim under the Guarantee” (3.5), and when a house changes hands the incoming owner owns that boiler. Clause 6.1 is the standard assignment clause rather than anything written for home movers: it lets Worcester Bosch assign or transfer its own rights and obligations at any time, and then says “You may only transfer your rights or your obligations under these Terms to another person with our prior written consent, which we will not unreasonably withhold or delay”. Either way, ring Worcester Bosch with the serial number and get that consent on record rather than assuming.

Ideal's published standard warranty terms and conditions (document IH00117), read in August 2026, set no separate condition for a change of owner: every condition attaches to the boiler and its service history rather than to a named person. Vaillant's guarantee terms and conditions, clause 16, are the ones people misread: that clause covers unbolting the appliance and taking it with you, which is not the same as selling the house and leaving it where it is.

The short version

If you read one part of this page, read this.

• A boiler guarantee attaches to the appliance at the address where it was installed, not to the person who paid for it.
• The annual service is the condition that keeps it alive, and it becomes the new owner's job on day one.
• Registration had a 30-day deadline from installation. Missed, the long guarantee usually drops back to 12 months.
• Taking the boiler with you is a different question: Vaillant's clause 16 and Worcester Bosch's relocation term both want written consent before the appliance is moved.
• Transferring the rights under the terms is separate again: Worcester Bosch's clause 6.1 asks for its prior written consent, so a new owner should get that consent on record.
• Worcester Bosch gives you the expiry date from the serial number, so a buyer can check before exchange.

Your statutory rights do not come with the house

This is the part people miss. Worcester Bosch spells it out at clause 3.7: the guarantee “is in addition to, and does not substitute, exclude nor limit any statutory rights you have against us and/or the seller or installer of the Product”. Those rights belong to whoever bought the boiler and paid the installer. What you inherit is the manufacturer's guarantee and its conditions, not the previous owner's consumer rights against the plumber.

Section 30 of the Consumer Rights Act 2015 is the law sitting behind that clause. It applies where there is a contract to supply goods and a guarantee in relation to those goods, and it defines the guarantee as an undertaking given to the consumer without extra charge that, if the goods do not meet the specifications set out in the guarantee statement or in any associated advertising, the consumer will be reimbursed or the goods will be repaired or replaced. So the guarantee runs on the terms the manufacturer published, and it sits alongside the rights the original buyer has against the seller or installer rather than replacing them.

Manufacturer by manufacturer

Boiler warranty when moving house: what to do on each side

If you are selling, leave the boiler paperwork in the house. Ideal's terms require the Benchmark commissioning sheet to be “completed by the installer and left with the boiler for reference purpose”, and Ideal can charge a call-out fee where “There is no completed ‘Benchmark’ commissioning sheet or equivalent control document present”. A missing booklet costs the buyer real money later.

If you are buying, get the serial number and check the remaining guarantee yourself before exchange. Worcester Bosch runs a public check for exactly this, asking you to “enter your 23 digit serial number below to find your guarantee expiry date”. Note the qualifier on the same page: “All dates and guarantee validity of boilers are subject to an annual service being undertaken every year since installation.” A date on a screen is not proof the conditions were kept.

Then ask, through your conveyancer, for the service history in writing. A boiler with a nominally live 10-year guarantee and no services since year two is not really covered.

The paperwork that should come with the boiler

The Building Regulations Compliance Certificate is the one buyers most often find missing, and it matters beyond the guarantee. Gas Safe Register's factsheet on notification of gas work in England and Wales sets out the duty: the registered business “has a legal duty to provide you with a certificate and ensure that the LA is made aware of the work by way of a notification within 30 days of completing the work”. The same factsheet sets out that the 30-day notification period excludes Saturdays, Sundays, bank holidays and public holidays, so the deadline runs slightly longer than 30 calendar days. It also warns that “If the work has not been notified, you will have no record that the work complies with Building Regulations. This will be important when you come to sell your home.” Scotland and Northern Ireland have different notification rules.

One safety point sits above all of this. If you smell gas in a property you have just moved into, do not start investigating the boiler or hunting for paperwork. Do not touch any electrical switches, do not smoke, put out all naked flames, open the doors and windows, and contact the National Gas Emergency Service immediately on 0800 111 999. Only a Gas Safe registered engineer may work on the appliance.

What quietly kills a transferred guarantee

A guarantee rarely gets cancelled. It lapses, because nobody noticed a condition running in the background. The missed annual service is the big one, and every manufacturer here shares it. Ideal's wording leaves no room for doubt: miss it and “the boiler warranty will lapse”. If you have just bought the house, that clock is now yours, and the anniversary runs from the installation date, not your moving date. Late registration is the second, and a buyer cannot fix it, because the 30-day deadline passed years before you saw the house. It is a question to ask, not a job to do.

Moving the appliance is the third. Ideal's warranty does not apply “If the boiler is removed from its place of installation without our prior consent”. Kitchen refits are where this usually bites.

Then there is a category a guarantee was never going to cover. Ideal's terms exclude defects caused by “the design, installation and maintenance of the central heating system”, and exclude de-scaling and work needed because of hard water scale or sludge from corrosion. A boiler failing because of a system the previous owner never flushed is not a guarantee job, however many years are nominally left.

Boiler warranty transfer FAQs

Inherited a boiler with no guarantee left?

Most home movers start with the boiler and central heating module, and you only pay for the modules you pick. Parts and labour are paid up to £500 in a 12-month period while the boiler is under 7 years old, and up to £200 once it is past 7. If the boiler you have just inherited is already playing up, that fault counts as pre-existing, so it needs a one-off repair rather than cover. Call-outs on a cover plan run Monday to Friday, 08:00 to 18:00, and we aim to get an engineer out to you within two working days. Moving in is when the £95 call-out fee is most likely to matter: paid in advance, it applies during your first 30 days, to faults the plan does not cover, to visits where nobody can let us in, and to an annual service asked for early. Your cover still applies right through those 30 days, and only the fee changes. You have 14 days to change your mind, and that window shuts the moment a service is carried out. From the first service you use, a 12-month agreement period runs, and leaving before it ends costs the remaining months or 75% of the outstanding balance. The engineers are a national network of thousands of Gas Safe registered engineers we work with. Smart Plan is a service plan, not insurance, from UK Boiler Company Ltd.

Helpful links

• How to check your boiler warranty
• Boiler cover when moving house
• Boiler checks before buying a house
• Boiler warranty vs boiler cover
• Boiler warranty expired: what next?
• Gas Safe Register: Building Regulations certificates
• Worcester Bosch guarantee check
• Baxi: boiler warranty information
• Vaillant: domestic boiler guarantee terms and conditions
• Ideal Heating: boiler warranties guide and warranty terms
• Consumer Rights Act 2015, section 30