Heat pump servicing that protects your warranty and extends the life of your system
DW Plumbing provide specialist heat pump servicing and maintenance for domestic properties across Cumbria, Lancashire and the Lake District. As Vaillant and Alpha approved engineers and BPEC qualified heat pump specialists, we carry out thorough annual heat pump services that protect your warranty, maintain efficiency, and extend the lifespan of your system. We service all makes and models, so whatever system you have installed, get in touch and we will let you know how we can help.


Essential maintenance to keep your heat pump running at peak efficiency
Regular heat pump servicing is one of the most important things you can do to protect the performance and longevity of your renewable heating system. Without annual maintenance, heat pumps can gradually lose efficiency, leading to higher running costs, reduced reliability, and in some cases voided manufacturer warranties. A professional heat pump service involves a comprehensive inspection of all system components, performance checks, filter cleaning, refrigerant level checks, and any necessary adjustments to ensure your system is running as efficiently as possible. We service both air source and ground source heat pumps across Cumbria and Lancashire.
"Booked an annual service for our Vaillant heat pump and Josh came out within a few days. Thorough inspection, cleaned the filters, checked everything over and sent a written report the same day. This is the professional service you want for an expensive bit of kit."
Family run, fully accredited, and built on doing things the right way
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Always speak to your engineer directly
When you call us you are speaking with the engineer doing the job, not a receptionist, not a sales team, not a call centre.
Every job carried out by our own engineers
Every job is planned, quoted and carried out by our own qualified engineers from start to finish, nobody else touches your home
Fully accredited, insured and qualified
We hold BPEC, OFTEC and MCS accreditations and carry full public liability insurance, giving you complete confidence on every job.
A small team you can hold accountable
We are small, local and built on reputation. Every job matters to us because in a small community, every job defines us
Family run with genuine family values
We treat every home we work in with the same care and respect we would give our own, because that is how a family business should operate
Honest advice and straightforward pricing
No jargon, no inflated quotes, no pressure. Just straightforward advice from experienced engineers who put your home first
Thorough, methodical services covering every component of your air or ground source system
Our heat pump service is a thorough, methodical inspection and maintenance visit carried out by our own qualified engineers. Here is what is included as standard in every service we carry out.
Full system inspection and performance checks
We carry out a comprehensive inspection of all system components including the heat pump unit, pipework, cylinder, and controls, checking that everything is operating correctly and identifying any issues before they develop into costly faults.
Filter cleaning and refrigerant level check
All filters are cleaned to ensure unrestricted airflow and optimal efficiency, and refrigerant levels are checked to confirm your system is operating within the correct parameters and delivering the performance it was designed for.
Controls, thermostat and efficiency check
We test all controls and thermostats to ensure they are functioning correctly and that your system is operating at the right flow temperatures for maximum efficiency, making adjustments where necessary to optimise performance and reduce running costs.
Written service report
Every service is completed with a full written report detailing the condition of your system, any work carried out, and any recommendations for future maintenance or repairs, giving you a complete record for warranty, insurance, and peace of mind purposes.
Annual heat pump servicing is essential for every air/ground source heat pump installed in a domestic property
If you have an air source or ground source heat pump installed, annual servicing is strongly recommended regardless of the age, brand, or condition of your system. Most manufacturer warranties require evidence of annual maintenance, and regular servicing is the single most effective way to protect your investment, maintain efficiency, and extend the lifespan of your heat pump. We service Vaillant and Alpha systems as approved engineers and are happy to service other makes and models too.
Manufacturer warranty requires annual servicing
System is 12 months or more old
Running costs have increased unexpectedly

Our straightforward, hassle-free process from start to finish
Every job we take on follows the same straightforward process, designed to keep you informed, comfortable, and in control from the first conversation through to completion. No hidden surprises, no unnecessary disruption, just honest trade work done properly.
Get in touch
Call, WhatsApp or fill in our contact form and we will get back to you the same day to discuss your project and next steps.
Site survey
One of our engineers visits your property to assess the job and provide honest, straightforward advice with no pressure to commit.
Quotation
We provide a clear, itemised quote with no hidden costs, no jargon, and no obligation to proceed until you are completely ready.
Installation
Our qualified engineers carry out all work to the highest standard and walk you through everything on completion before we leave.
Answers to frequently asked questions about heat pump maintenance and servicing
Everything you need to know about heat pump servicing, what it involves, how often it is needed, and what to expect from a professional annual maintenance visit.
Heat pump servicing should always be carried out by a qualified engineer with specific heat pump training and experience. It involves a systematic inspection of all mechanical, electrical, and refrigerant components, along with filter cleaning, performance checks, and controls testing. Attempting to service a heat pump without the right qualifications and equipment can invalidate your warranty and cause damage to the system. As BPEC qualified heat pump engineers, we carry out every service to the manufacturer's recommended standard and provide a written report on completion.
A heat pump service involves a thorough inspection and maintenance visit covering all key system components. This includes checking the heat pump unit itself, cleaning or replacing filters, inspecting pipework and connections, checking refrigerant levels, testing controls and thermostats, verifying flow temperatures and efficiency levels, and identifying any potential issues before they develop into faults. Every service we carry out concludes with a full written report so you have a complete record of the work done and the current condition of your system.
Our heat pump service includes a full system inspection, filter cleaning, refrigerant level check, controls and thermostat testing, flow temperature and efficiency verification, and a written service report. We check all components of your air source or ground source heat pump system, including the heat pump unit, cylinder, pipework, and controls, to ensure everything is operating correctly and efficiently. Where we identify any issues or potential improvements, we will discuss these with you honestly before carrying out any additional work.
Servicing a heat pump entails a comprehensive maintenance visit by a qualified heat pump engineer covering all aspects of the system. For an air source heat pump this includes inspecting the external unit, cleaning filters, checking refrigerant, testing electrical components and controls, and verifying system performance. For a ground source heat pump it additionally involves checking the ground loop or borehole connection and the condition of the heat exchanger. In both cases the visit concludes with a performance review and written report documenting the current health of the system.
The cost of a heat pump service varies depending on the type and size of your system, its age, and the extent of work required during the visit. As Vaillant and Alpha approved engineers, we carry out every service to the manufacturer's standard and provide a full written report. We are always happy to provide a clear, upfront quote before booking a service so you know exactly what to expect. Get in touch with our team directly and we will give you an honest, straightforward price for servicing your specific system.
The cost of an air source heat pump service depends on the brand and model of your system, its age, and whether any additional work is identified during the inspection. We service Vaillant and Alpha systems as approved engineers and are also happy to service other makes and models. Rather than publish a standard rate that may not reflect your specific system, we prefer to give you a clear, accurate quote before any work is booked. Contact us directly and we will provide a straightforward price with no hidden extras.
A standard heat pump service typically takes between one and two hours depending on the type and complexity of your system and whether any additional work is required during the visit. Air source heat pump services are generally quicker than ground source services due to the additional components involved in ground source systems. We always aim to complete the service efficiently and with minimal disruption to your home, and we will give you a realistic time estimate when booking your appointment.
We recommend having your heat pump serviced at least once a year to ensure optimal performance and reliability. Annual servicing is also typically a requirement of manufacturer warranties, so skipping a year could leave you without warranty cover if a fault develops. For properties where the heat pump is the primary heating source, or for systems that are working particularly hard, more frequent maintenance checks may be beneficial. Our team is happy to advise on the right servicing schedule for your specific system and usage.
The primary maintenance requirement for a heat pump is an annual professional service carried out by a qualified engineer. In between services, there are a few simple checks you can carry out yourself, such as ensuring the external unit of an air source heat pump is free from debris, leaves, or obstructions, and checking that your controls and thermostats are functioning as expected. Any unusual noises, error codes, or unexpected increases in running costs should be reported to a qualified engineer promptly to prevent minor issues from developing into significant faults.
A heat pump requires annual professional servicing as its primary maintenance, covering all mechanical, electrical, and refrigerant components. Beyond the annual service, keeping the external unit clear of debris, checking filter condition periodically, and ensuring controls are set correctly are simple steps that help maintain efficiency between services. As Vaillant and Alpha approved heat pump engineers, we are always happy to advise on the best maintenance approach for your specific system and provide guidance on how to keep it running at peak performance year-round.
Accredited, insured and only using the best brands
Every installation we carry out uses the best brands and is backed by industry-leading accreditations and full public liability insurance.






BPEC-qualified heat pump engineers serving Cumbria and Lancashire and beyond
As BPEC qualified engineers and approved Vaillant and Alpha installers, we have the technical knowledge and hands-on experience to service heat pump systems properly. We service both air source and ground source heat pumps, carry out every visit personally with no subcontractors, and provide a full written report on completion of every service. If you have a system installed by another engineer, we are still happy to help. Just get in touch and we will let you know how we can support you.
"Our heat pump had been making a noise we were not happy about. The team came out, diagnosed the issue straight away and sorted it during the service visit. Clear pricing, no unnecessary work, and great communication throughout. I will bill be booking them every year going forward from now on."
Explore our other renewable heating and plumbing services
Heat pump servicing sits alongside our full range of renewable heating installation and maintenance services. Whether you need a new air source or ground source heat pump installed, want to pair your existing system with underfloor heating, or are looking for a full heating system design, we offer the specialist expertise to help.

Air source heat pumps
If your existing air source heat pump is beyond repair or coming to the end of its lifespan, we install new Vaillant and Alpha systems across Cumbria and Lancashire. We can assess your current system and advise honestly on whether repair or replacement is the right option.
Ground source heat pumps
We install and service ground source heat pump systems for domestic properties across Cumbria and Lancashire. If you are considering upgrading from an air source to a ground source system, we can survey your property and provide clear, honest advice on the options available.
Full heating systems
If your annual service reveals that your wider heating system needs attention, we design and install complete heating systems tailored to your property. From new pipework and radiators to full system upgrades, we handle everything in-house.
Get a quotation from our friendly plumbers today
Whether you have a question, need honest advice, or are ready to get a project underway, just give us a call or drop us a message. You will speak directly with the people doing the work, any day of the week.

