Fast, honest boiler repairs by Gas Safe engineers
Book Your Boiler repairs all major boiler brands across Cardiff and Caerphilly, with repairs typically ranging from £96 to £500 depending on the fault and parts. A Gas Safe registered engineer diagnoses the problem, checks whether parts are still available and what they cost, and gives you honest advice on whether a repair or a replacement is the better value. Most common faults are fixed quickly.
When your boiler stops working it is stressful, especially in the colder months. We respond quickly across Cardiff and Caerphilly, diagnose the fault properly, and explain in plain English what has gone wrong and what it will take to put it right. No jargon and no pressure.
In most cases a boiler can be repaired. Once we have investigated, we will tell you whether the parts are still available, what they cost, and whether it is economically worth replacing them given the age and condition of the boiler. You always get the full picture before any money is spent.
We carry common parts so that many faults are fixed on the first visit. Where a manufacturer-specific part needs ordering, we will let you know straight away and get you booked back in as quickly as we can, keeping you updated the whole way through.
If a repair does not make financial sense, we will say so honestly and talk you through your replacement options without any hard sell. Our reputation across South Wales is built on giving people advice we would give our own family.
Darran Gray
Chad was fantastic. Couldn’t have done more for me, advised the appropriate air con system for my needs, explained the installation process and got to work. It was less than a week from initial quote, to sign off. Thank you so much. Bring on the heatwave!!!!!
sheryl fitzgerald
Went above and beyond, incredibly helpful. Highly recommend and will use again for future projects
neil pash
Chad came out to fix a leak and service our boiler today and did a fantastic job. Arrived exactly on time, worked cleanly and efficiently, and got everything sorted without any fuss. Really professional service from start to finish — highly recommended.Thank you.
Nerys Burford
I recently discovered a leak in my property but didn’t know a plumber I was given the contract number for Chad at book your boiler within 30min of the phone call Harry arrived found the leak and fixed it with in minutes. Every person I had contact with was lovely very experienced professional and knowledgeable customer service I received from Kelly was outstanding highly recommend will be definitely be contacting them again when needed. All the best Nerys
Michael Davies
Chad was very friendly and professional. He came out to inspect the boiler very quickly, sourced the parts, and fixed the boiler the same day the parts arrived. I’d highly recommend Book your Boiler.
Caer Ffili
Very personable chap. Carried out a very thorough service of the boiler taking the time to explain everything and spending much more time than our usual previous engineer from a different company who it seems hadn’t been doing a very good job.
Darren O'Malley
I recently had the pleasure of using Chad Greenway Heating and couldn’t be more satisfied with the experience. From start to finish, they were reliable, professional, and incredibly easy to deal with. They responded quickly to my enquiry and arrived promptly, which was a huge relief.What really stood out was their excellent customer service—they took the time to explain the issue clearly and made sure I was comfortable with the solution before proceeding. The work was completed efficiently and to a high standard, with everything left clean and tidy afterwards.It’s not always easy to find someone you can trust, but I would have no hesitation recommending this plumber to others. I’ll definitely be using their services again in the future.
Ed Siegle
Rapid response, speedily arranged appointment, first class workmanship and clear explanation on boiler repair, first class service all round
Nick Turner
Just installed my new Japanese toilet! Great guys and great service!Highly recommend!Thanks again!
Joe Singh
Fitted aircon at our home, very happy from start to finish!
Tag Yrast
I recently hired Book your Boiler to service my boiler in Dinas Powys after seeing they had worked locally and I couldn’t be more impressed. Chad was incredibly professional, respectful and took the time to explain every part of the process. I particularly appreciated the detailed checklist and photos he provided, which gave me total peace of mind. Excellent technical skill, a very fair price and easily the most professional tradesman I’ve had in my home.
Tom Allen
Chad and Kelly have been amazing, incredibly communication and setting high expectations from the first phonecall! Thank you !
Edward Smith
Harry did a full install on an en suite which we had found difficult to use due to very limited space.An outstanding job using very modern fittings such as a shower pivot door, ‘floating’ basin and toilet. This utilised every possible inch of space. It was designed by Megan at BGS. Great team, thanks.
Lewis Conway
Chad was great! Swift and professional service
Sian Cousins
As a first time buyer I was completely overwhelmed when I learned my boiler was broken, but as soon as I phoned Book your Boiler they were nothing but polite and helpful. They were easy to contact, their messaging system was so useful and easy to use and I could send photos too so they could prepare for the visit. On arrival they took the time to answer all my questions and relieved my concerns. I would 100% look to book them again when required!
Szilvia Nagy
I’m extremely satisfied with the boiler service received on Wednesday. Our boiler stoped working and sent faulty codes.I know the team from previous plumbing work on our house. And requested a visit by email.Chad arrived in time. He is friendly, professional, and very knowledgeable. Everything was explained clearly, and the work was carried out efficiently and to a high standard.I did not think such a lot of debris able to build up in the boiler! … now i understand why is important the yearly service.I was pleasantly surprised by the fees, reasonable and less than I worried about/expected.I also want to mention Kelly, who organised the booking and kept me updated throughout. Her communication was excellent and made the whole process smooth and stress-free.I would definitely recommend this company and will happily use their services again in the future.
Adrienn Szamelne Kovacs
We had a minor leak and hot water issues with our boiler. We spoken and Chad came over the next morning to see the problem. We agreed an appointment when he come and do the job, but fortunately he had a free time 2 days later. He called if is okay and he has perfectly completed the job with the replacement part.He had resolved our issue with the boiler in a really short period of time. He promissed and he came.Excellent service and friendly guy.We highly recommend them.We had an other issue with our toilet cistern valve. I have contacted with Chad, he was really helpful. I send over the issue with some pictures and in the couple of days Harry came over and done the job perfectly!Kelly has sent over follow up email if is everything works properly.We are really happy with them and definitely use their services next time.Again, we highly recommend them.Thank you very much. 😊
James H
My boiler was making a loud banging noise, and Book Your Boiler came and repaired it quickly. Everything was professional, with updates every step of the way and excellent communication. Chad was friendly, professional, and explained everything in detail. Highly recommend!
Maria Hedges
Fantastic service. Very friendly and informative. Work was carried out quickly and cleanly. The booking system made booking easy, and provided regular updates on when I could expect them to arrive. All round great service, would highly recommend.
graeme prance
Always top service from chad
Robert Dale
Have used book your boiler on four occasions new radiators boiler taps and bath panel very efficient clean and helpful with a good follow up service to inspect boiler.would recommend to family and friends
Heulwen Egerton
Book your boiler recently changed my bathroom flooring. Harry was excellent, kept me informed, discovered a leak in piping and dealt with it, friendly, listened to me. Kelly in the office kept me informed about date and time of arrival.
Red jewel
Excellent x
Simon Mawer
The team at BYB are brilliant. From Kelly & Chad to Harry who came and did the work . It was a very professional service. Harry was quick , tidy and did the job with no fuss. I would not hesitate to recommend them. They are great local family run business that are at the beating heart of our economy. We should all support business’s like this.
Jayne Roberts
Chad was excellent. Kept me informed from the time I booked him until job was done. Serviced boiler and kept me informed all the time as to what he was doing. And at a reasonable price. Very thorough with his work takes pride in it. Defiantly recommend to anyone. Thankyou..Also goes the extra mile to help you with contacting anybody else if needed. Very happy and would definitely recommend to friends and family.I had to have new pump on boiler. As it is still under warranty with baxi it will be sorted by them. Chad called them for me and sorted it out. So helpful.
Chris Dowdall
I found book your boiler through a quick Google search for boiler service and tap repair. I found Chad to be very professional and courteous. Kelly was also very helpful letting us know estimated arrival time and booking information and adjusting times to allow for our needs. I would use them again and recommend to others. Thanks both.
lauren brown
Excellent service provided by chad he was really efficient and friendly gave really good advice, also very satisfied with the customer service by Kelly over the phone she was very helpful and kind.
Ruth Elizabeth
Thank you for coming out so last minute! Didn’t rush and took time, thanks again! Would recommend
Martine Marple
Polite, efficient and friendly.Excellent service.
Gareth
Amazing service. Very professional. Highly recommended.
We are based in Caerphilly and cover Cardiff, Caerphilly, Newport, Pontypridd, Barry, Penarth, Sully, Bridgend and the surrounding parts of South Wales. If you are not sure whether you are in our area, give us a call on 07894 080 679 and we will let you know.
Book Your Boiler is a family-run business and owner Chad Greenway has 18 years of hands-on experience as a plumbing and heating engineer. Chad leads a hand-picked team who all share the same standards, so you can expect the same quality of work on every visit.
Yes. We are Gas Safe registered, which is a legal requirement for anyone working on gas appliances in the UK. We are also REFCOM F-Gas certified for air conditioning work, so whatever the job, it is carried out safely and to the correct standards.
Our standard hours are Monday to Friday, 08:30 to 17:00. Get in touch by phone, WhatsApp or email and we will get you booked in at a time that works around you.
Yes. We provide free, no-obligation quotes for boiler installations, air conditioning and most heating work. Send us a few details by email or WhatsApp, or give us a call, and we will come back to you with a clear price.
Yes, and we are very proud of it. In 2025 we were named Boiler Contractor of the Year, and we were also shortlisted as a finalist at the Start-Up Business Awards. It means a lot coming from an industry we care so much about.
A combi boiler has all the components it needs inside the one unit, which makes it compact and a popular choice for many homes. A system boiler needs a separate hot water cylinder and diverter valves, which can suit larger homes with a higher demand for hot water. We will recommend the right option for your home when we survey.
A new boiler supplied and installed typically costs between £2,300 and £5,000. The exact price depends on the boiler you choose, the size and complexity of your system, and any extra work involved. We give you a clear, fixed written quote after surveying your home.
A straightforward boiler swap is usually completed in one to two days. A more involved system upgrade or a change of boiler type can take a little longer. We will give you a clear timescale as part of your quote so you can plan around it.
Yes. Removing and disposing of your old boiler is included as part of our installation service. We handle everything, from disconnecting the old unit to taking it away responsibly, so you do not have to arrange anything separately.
Yes. Every new boiler we install comes with a manufacturer warranty, and we register it on your behalf so you are covered from day one. We will explain the warranty terms before you commit so you know exactly what is included.
A service includes cleaning out the condensate trap and the magnetic filter if one is fitted, then cleaning and servicing the heat exchanger. We also carry out diagnostic checks to make sure the boiler is running within safe working limits, and we leave you with a record of the work.
An annual boiler service costs between £96 and £120 depending on the make and model. We will confirm the exact price when you book. It is a small cost that protects your warranty and helps avoid bigger bills later on.
We recommend servicing your boiler once a year. An annual service keeps your manufacturer warranty valid, helps the boiler run safely and efficiently, and catches small issues before they turn into expensive breakdowns. Autumn is a popular time to book, ready for winter.
Yes. We set up annual reminders so you never have to remember when your service is due. We even attach a barcode to your boiler that lets you report any issue to us in seconds, which is all part of the ongoing care we build into our service.
Usually, yes. Most manufacturers require a boiler to be serviced every year by a registered engineer to keep the warranty valid. We carry out the service and leave you with a record, so your cover stays in place.
In most cases, yes. Once we have investigated the fault, we will tell you whether the parts are still available, what they cost, and whether it is economically worth replacing them given the age and condition of the boiler. You get the full picture before any money is spent.
Boiler repairs typically range from £96 to £500 depending on the fault and the parts needed. We diagnose the problem first and give you a clear price before carrying out any work, so there are no surprises.
Often, yes. We carry common spare parts so we can fix many faults on the first visit. If a manufacturer-specific part needs ordering, we will tell you straight away and get you booked back in as quickly as possible.
Yes. Our engineers work on all the major boiler brands. We diagnose the fault, explain what is needed, and give you honest advice on whether a repair or a replacement is the better value for you.
A boiler that keeps losing pressure usually points to a small leak in the system or a faulty expansion vessel or pressure relief valve. You can top it up using the filling loop if you are comfortable doing so, but if it keeps dropping, give us a call and we will find the cause.
Yes. We will carry out safety checks to make sure the current gas supply is safe, then make provision for installing a new gas supply, ensuring it is installed to current gas regulations. It is a common job for kitchen changes and new appliances.
Yes. All of our gas work is carried out by Gas Safe registered engineers, which is a legal requirement for gas work in the UK. We sign every job off to current gas regulations and provide the relevant paperwork.
Yes. We install and check gas appliances including cookers and hobs, and we can fit new gas supplies where needed. We always test thoroughly and leave you with documentation that confirms the work is safe and compliant.
Yes. We carry out gas safety checks and inspections for homeowners and landlords. If we find anything that is not right, we will make it safe and explain clearly what needs doing.
Yes. We carry out landlord gas safety checks and provide the certificate (CP12) required for rental properties. Get in touch and we will arrange a visit at a time that suits you and your tenants.
Yes, air conditioning heats as well as cools. A modern system keeps you cool in summer and works in reverse to heat your rooms efficiently in winter, giving you year-round comfort from a single unit.
They are extremely energy efficient. Depending on the unit you could achieve a coefficient of performance of around three, which means for every 1kW of electricity you use you get roughly 3kW of heating or cooling output. That makes it a cost-effective way to control the temperature in your home.
Air conditioning installations typically range from £1,400 to £7,000 depending on the type and number of units. We will assess your space and give you a clear quote for the system that suits your home and budget.
Yes. Our air conditioning installs are carried out by REFCOM F-Gas certified engineers, so the refrigerant work is handled correctly and safely, in line with the regulations.
We install wall-mounted, ceiling and multi-room systems to suit your space. During your free survey we will advise on the best position for efficient, even temperatures and a neat finish.
That humming noise is usually water hammer. It is caused by surges within the water pressure, typically from a defective tap or toilet valve. It is a common problem and one we fix regularly, so get in touch and we will sort it.
We cover the full range of general plumbing, from leaks, taps, toilets and low pressure through to bathroom installations, showers and pipework. Whatever the size of the job, we will explain what is involved and give you a clear price.
Yes. Leaks are one of the most common jobs we deal with, and we know they need sorting quickly before they cause damage. Give us a call or send a message and we will get to you as soon as we can.
Yes. As well as everyday plumbing repairs, we take on larger jobs including new bathrooms, showers and full pipework replacements. We carry out the work to a high standard and keep your home clean and tidy throughout.
We keep our pricing clear and fair. Tell us about the job by phone, WhatsApp or email and we will explain the costs up front before we start, so you always know where you stand.