How to Check Heat Pump Installation Warranty Coverage
Last Updated: October 31, 2026
Quick Summary
A heat pump warranty covers faults in the equipment itself, usually from manufacturing defects, for a set period. Installation faults fall under a separate installer workmanship guarantee, so check both in writing. Read the exclusions and registration conditions before you sign, and keep your records safe.
Manufacturer warranties protect the product, while installer guarantees protect the quality of the fitting.
Check whether labour is covered, as many warranties replace parts but not the visit to fit them.
Register the product within the required window, since failing to do so can reduce or remove your cover.
Keep servicing records from an approved engineer, because missed servicing can give grounds to reject a claim.
Store the installation certificate, serial numbers and proof of purchase digitally and on paper.
Table of Contents
This guide helps you understand what your heat pump warranty actually covers, and what you need to do to keep that protection in place. Knowing the difference before a fault appears can save you a great deal of frustration and cost.
What a Heat Pump Warranty Covers
A heat pump warranty is a promise from the manufacturer or installer to repair or replace something if it fails within a set period. The exact terms vary, so always read the document that came with your system.
Most warranties protect the physical equipment against manufacturing defects. They do not usually cover normal wear, damage from poor maintenance or problems caused by the wider heating system.
Parts and Component Coverage
Warranties usually list the components they cover by name. Common examples include:
The outdoor heat pump unit and its compressor
Circulation pumps and control boards
Sensors and electronic controllers
Heat exchangers and internal pipework
Check whether each part is covered for the full warranty period or only for a shorter time. Some manufacturers give longer cover for the main unit than for smaller components.
Labour and Installation Coverage
Parts cover does not always include labour. Many manufacturer warranties will replace a faulty part free of charge, but someone still has to fit it. Find out who pays for that visit.
Installation workmanship is usually a separate promise from the installer.
Manufacturer Warranties Versus Installer Workmanship Guarantees
These two types of cover protect different things, and you may need both.
A manufacturer warranty protects the product itself. It covers faults that come from how the equipment was made.
An installer workmanship guarantee protects the quality of the fitting. It covers mistakes made during installation, such as poor pipe connections or incorrect commissioning.
Ask your installer to confirm in writing which guarantee they give, how long it lasts and what it excludes. A good installer should be willing to explain this clearly.
Heat Pump Warranty Terms and Conditions to Read Before You Sign
Before you sign a contract, read the warranty terms in full. Look for these details:
M Price Plumbing & Heating Limited
How long each type of cover lasts
Which components are listed, and which are excluded
Whether labour is covered
What the warranty requires you to do to stay valid
How claims must be made and within what time limit
Pay special attention to conditions that could void your cover. If the terms say servicing must be done by an approved engineer, keep proof that it was done.
Heat Pump Warranty Registration: What to Do and When
Many manufacturers ask you to register the product within a set period after installation. Failing to register can reduce or remove your cover, so do this straight away.
Keep these records safe:
The installation certificate
The product serial numbers
Proof of purchase and the installer's invoice
Any commissioning report
Store copies both digitally and on paper. You will need them if you ever make a claim.
Heat Pump Servicing Requirements That Protect Your Cover
Regular servicing keeps your system running well and is often a condition of the warranty. Missing a required service can give the manufacturer grounds to reject a claim.
Book servicing at the interval the manufacturer specifies
Use an engineer who is qualified to work on the system
Keep a written record of every service visit
Ask the engineer to note any faults they find
Check whether the warranty requires a particular type of engineer, as this can differ between manufacturers.
Heat Pump Warranty Exclusions and How Cover Can Be Voided
Exclusions are where most disputes begin. A warranty is a contractual promise, and every manufacturer writes limits into it. Read the exclusions list line by line before you sign, because the same fault can be covered under one type of guarantee and excluded under another.
Common manufacturer exclusions
Most manufacturer warranties exclude:
Damage from frost, flood, lightning or other external events
Faults caused by unqualified repairs, third-party modifications or non-approved parts
Problems traceable to poor system design, incorrect sizing or faulty pipework and electrical work
Normal wear and tear, consumables and routine maintenance items
Damage from running the system outside its stated operating limits
Cosmetic damage that does not affect performance
Faults where required servicing or registration was not completed
Exclusions that hit installation quality
This is the area homeowners underestimate. A manufacturer warranty protects the product, not the fitting. If a compressor fails because the system was incorrectly sized, poorly commissioned or charged with the wrong refrigerant, the manufacturer may treat it as an installation defect and decline the claim. Responsibility then shifts to the installer's workmanship guarantee, which is why you need both, in writing.
A common pattern is for the manufacturer to ask for commissioning records before it will consider a claim. If those records show the system was set up outside specification, the claim can be rejected on that basis alone.
Actions that can void cover
Some actions can remove protection entirely rather than just limit it:
Skipping servicing at the manufacturer's stated interval
Failing to register the product within the required window where registration is a condition
Fitting non-approved parts or allowing unqualified work on the system
Moving or altering the system without the installer's involvement
Failing to report a fault within the claim time limit
Watch Out Voiding is rarely automatic. Manufacturers usually have to show that the action caused or contributed to the fault. Ask for that reasoning in writing if a claim is refused on these grounds.
How this interacts with your statutory rights
A manufacturer warranty sits alongside your statutory consumer rights, not instead of them. In the UK, goods must be of satisfactory quality, fit for purpose and as described (Consumer Rights Act 2015). If a heat pump fails early because it was not of satisfactory quality, you may have a remedy against the trader who supplied it even where the manufacturer warranty has expired or been refused. The manufacturer guarantee is a commercial promise; your statutory rights are separate and cannot be signed away by warranty terms (Consumer Rights Act 2015).
That distinction matters when a claim is rejected. A refused warranty claim is not necessarily the end of the matter, it may simply mean the route changes from the manufacturer to the installer or supplier.
Key Takeaway Before installation, ask for the exclusions list in writing and confirm which party, manufacturer or installer, is responsible for design, sizing, refrigerant, electrical work and commissioning faults. That single question prevents most later disputes.
Making a Claim Under Your Heat Pump Warranty
A claim succeeds or fails on records. The practical difference between a smooth repair and a rejected claim is usually whether you can show what was installed, how it was commissioned, how it has been serviced and when the fault first appeared.
Before you call: the evidence pack
Gather these before contacting anyone, so the first conversation is productive:
The installation certificate and commissioning report
Product serial numbers and model details
Proof of purchase and the installer's invoice
Every service record, with dates and the engineer's details
A written note of the fault, when it started and any error codes displayed
Photographs or short video of the fault where it is visible
Keep digital and paper copies. Manufacturers commonly ask for commissioning evidence first, and a missing report is one of the most frequent reasons a claim stalls.
The claim sequence
Check the terms first. Confirm the claim window, the required contact route and whether labour, call-out fees, refrigerant and removal or reinstallation are included. Parts-only cover can still leave you paying for the visit.
Contact the correct party. Product faults go to the manufacturer; installation and workmanship faults go to the installer. If you are unsure which applies, contact both in writing and let them establish responsibility.
Put it in writing. Email or letter creates a dated record. State the fault, the serial number, the installation date and what you are asking for.
Keep a claim log. Record every call, reference number, name and promised action. This becomes important if the matter escalates.
Confirm the remedy in writing. Before work begins, ask whether the repair is under warranty, who pays for labour and parts, and what happens if the fault recurs.
If the claim is rejected
A rejection is not always final. Ask for the reason in writing and compare it against the warranty terms and the commissioning records. Common rejection grounds are missed servicing, installation defects or faults attributed to the wider system, each of which can be challenged if the evidence does not support it.
If the manufacturer maintains the fault is an installation issue, put the question to the installer in writing and ask them to confirm their position. Where the two parties disagree, the commissioning report and service history usually decide the outcome.
Where to go next
If the dispute continues, you have options beyond the manufacturer:
Raise a formal complaint through the installer's or manufacturer's complaints procedure
Seek advice from a consumer body such as Citizens Advice (Contact the consumer service)
Contact the relevant trading standards service through Citizens Advice
Use the installer's certification scheme complaint process where they are registered with one
Consider your statutory rights against the trader who supplied the system
Pro Tip Ask for every rejection in writing and keep the correspondence. A written reason is what allows you to challenge it, and it is what any adviser or certification scheme will ask to see first.
Key Takeaway The strongest claim is a documented one. Confirm eligibility before installation, retain the commissioning report, register the unit, schedule servicing on time and log faults as they appear, that sequence does more to protect your cover than any single warranty term.
Booking Your Heat Pump Installation and Checking Its Cover With Heatgeek Wales
Clear warranty cover starts with a well-documented, properly commissioned installation.
If you are thinking about a new system, you can book a free heat pump survey with Heatgeek Wales.
Frequently Asked Questions
What is covered under a heat pump warranty?
A heat pump warranty usually covers manufacturing defects in the unit and its components, such as the compressor, heat exchangers and controls, for a set period. Installation cover is separate and comes from the installer, who is responsible for workmanship faults in pipework, connections and commissioning. Labour cover varies, so check whether the terms include the cost of engineer visits to repair or replace faulty parts. Always read the written terms, because coverage, exclusions and claim conditions differ between manufacturers and installers.
Do I need to register my heat pump warranty?
Many manufacturers require registration within a set period after installation, often a number of weeks, before the extended warranty applies. Registration usually needs the installer's details, the installation date, the serial numbers of the unit and proof of purchase. Keep a copy of the confirmation and your installation records. Without registration, some manufacturers only provide a shorter standard warranty, so check the deadline in the product documentation as soon as the system is commissioned.
Does a heat pump warranty require regular servicing?
Most heat pump warranties make servicing a condition of cover. Manufacturers typically ask for an annual service by a qualified, MCS-certified engineer, with records kept as evidence. Missing servicing or using unqualified people for maintenance can give the manufacturer grounds to reject a claim. Confirm the required service interval and who must carry it out in your warranty terms, and keep every invoice and service report.
Can poor installation invalidate a heat pump warranty?
Yes. If the installation does not follow the manufacturer's requirements, such as incorrect sizing, poor commissioning or non-approved components, the manufacturer may refuse a claim for resulting faults. Installer workmanship is usually covered separately by the installer's guarantee, so a defect caused by installation should be raised with the installer first. Ask for a commissioning report and written confirmation that the installation meets the manufacturer's specification.
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