We're Thames Boilers, your trusted local heating experts in Eltham since 2017, with over 25 years of industry experience. Our Gas Safe registered engineers specialise in repairing all major boiler brands, from Vaillant to Worcester Bosch, and we're proud of our consistent 5-star customer ratings. We serve Eltham Park, Well Hall, Horn Park, Mottingham, and New Eltham with quick response times and transparent pricing, typically ranging from £150 to £350. Our convenient online booking system is available 24/7, and we back our work with a 12-month parts guarantee. There's plenty more to discover about how we can keep your home warm and comfortable.
Why Choose Thames Boilers To Repair Your Boiler?

With over two decades of experience in boiler repairs, Thames Boilers brings proven expertise to every job in Eltham.
We're your local heating experts, ready to tackle any boiler issue with the knowledge we've gained since 2002.
When you choose us, you're getting more than just a repair service – you're getting a trusted partner who'll treat your home like our own.
- We provide honest, straightforward advice about whether repairs are worth it, along with valuable boiler maintenance tips to prevent future breakdowns.
- Our Gas Safe registered engineers can diagnose and fix issues with all major domestic boiler brands.
- We'll share energy efficiency advice during our visit to help you save on heating bills.
As your neighbours in Kent, we recognise the importance of reliable heating and take pride in keeping your home warm and comfortable.
Our convenient online booking system lets you schedule repairs 24/7 with real-time engineer tracking for complete peace of mind.
Customer Reviews

Don't just take our word for it – see why homeowners across Kent trust Thames Boilers with their heating systems.
Our real customer feedback shows consistently positive experiences from Eltham residents.
Check out our 5-star customer reviews and discover why we're the trusted choice for boiler repairs in Eltham.
Book Your Eltham Boiler Repair Online Today

Ready to get your boiler fixed in Eltham?
Book your repair appointment in seconds through our easy-to-use online booking system. You'll receive instant confirmation and a real-time tracking link when we're on our way.
Book Your Boiler Repair Online Now
Available Monday to Friday, 9am to 5pm for repairs across Eltham and surrounding areas.
Gas Safe registered engineer with over 25 years of experience.
Our 12-month repair guarantee ensures complete peace of mind on all replacement parts we install.
Boiler Repairs Questions & Answers

We understand you've got questions about getting your boiler fixed in Eltham, from costs and timings to guarantees and services. Our team is here to guide you through the entire process, ensuring you receive clear information about your options. Additionally, we offer comprehensive boiler servicing in Eltham to help maintain your system and prevent future issues, giving you peace of mind. Don’t hesitate to reach out for expert advice tailored to your specific needs.
As Gas Safe registered engineers, we're here to walk you through everything you need to know about boiler repairs, including whether you should book a repair or service appointment.
Our professional team has experience fixing issues with major boiler brands, including Worcester Bosch, Vaillant, and Baxi systems.
Let's tackle your most common questions about boiler repairs to help you make informed decisions about your heating system.
How much will it cost to fix my boiler?
Determining the exact cost of a boiler repair isn't possible without first diagnosing the specific issue. When you book a diagnostic visit with us, we'll thoroughly examine your boiler to identify what's wrong.
Some repairs might only need an hour of labour, while others could require replacement parts like pumps or circuit boards, ranging from £150 to £350.
Despite what some common repair myths suggest, there's no one-size-fits-all price for boiler repairs. Our customers appreciate that we're upfront about costs after diagnosis, and we'll always explain what needs fixing in plain English.
While boiler troubleshooting tips can help identify simple issues, professional diagnosis guarantees you'll know exactly what you're paying for and why. We believe in transparent pricing and won't recommend unnecessary repairs.
For well-maintained boilers under 10 years old, repairs are typically the most cost-effective solution compared to replacement.
How soon can you fix my boiler?
Booking availability for boiler repairs varies throughout the year.
During the summer months, when common boiler issues are less frequent, we're typically able to get to you within a day or two.
However, as temperatures drop and heating systems face more strain, our schedule becomes busier, and you might need to wait a couple of weeks for an appointment.
For up-to-date availability, we suggest checking our online booking system at booking.thamesboilers.co.uk.
Our online job booking process makes scheduling your repair quick and convenient.
While you're waiting, there are some boiler maintenance tips you can follow to prevent further issues: check your boiler pressure, verify radiators are bled properly, and keep the area around your boiler clear.
We understand waiting for repairs isn't ideal, but we'll always do our best to fit you in as soon as possible.
What guarantees do you offer on boiler repairs?
Clear guarantees protect your investment in boiler repairs. We recognise you want peace of mind when getting your boiler fixed, which is why we're upfront about our repair guarantees.
Any parts we replace during your repair come with a thorough 12-month guarantee, and if these specific components fail within that time, we'll replace them at no cost to you.
However, it's essential to mention that our guarantee only covers the parts we've actually replaced. If other issues develop with your boiler or heating system after our repair, these aren't covered under the guarantee, and you'll need to book a separate diagnostic visit.
We believe in being transparent about our guarantees because customer satisfaction is built on trust and clear communication about what's included in our service.
With Gas Safe registration and full public liability insurance, you can trust that all our repair work meets the highest safety standards.
Should I book a boiler service or a repair?
You need to book a repair – not a service – if your boiler isn't working properly.
One of the most common repair mistakes we see is when homeowners book a service hoping it'll fix their broken boiler. While we recognise the confusion, a service is actually routine maintenance for a working boiler, not boiler troubleshooting tips for fixing problems.
Think of it like your car – if it won't start, you wouldn't book it in for a regular service, right?
You'd take it to the garage for repairs. It's the same with your boiler. When something's not working – whether it's low pressure, no hot water, or strange noises – we'll need to diagnose and fix the specific issue during a repair visit.
Always ensure your repairs are completed by Gas Safe registered engineers to maintain safety and legal compliance.
Are you gas safe registered?
Safety and legal compliance are essential when it comes to working with gas appliances, which is why we're fully Gas Safe registered.
As your local heating experts in Eltham, we take Gas Safety seriously and maintain up-to-date certification to work on all domestic gas boilers and heating systems. We pride ourselves on our commitment to safety and quality workmanship, ensuring your home remains warm and secure. Our comprehensive heating services in Eltham cover everything from routine maintenance to emergency repairs, giving you peace of mind year-round. Trust us to deliver reliable solutions tailored to your specific heating needs.
When you choose us for your boiler maintenance needs, you can rest easy knowing that our work meets all legal requirements and industry standards.
We've been Gas Safe registered (formerly known as CORGI) since 2002, giving us over two decades of experience working safely with gas appliances.
You'll find our Gas Safe registration details clearly displayed on all our documentation, and we're always happy to show our credentials before starting any work in your home.
About Thames Boilers

Local heating specialists Thames Boilers have proudly served Kent homeowners since 2017, when founder George Lane established the company in Greenhithe.
With over 25 years of industry experience, we've built our reputation on delivering exceptional customer service and reliable heating solutions to local families just like yours.
We're not your typical heating company – we believe in doing things differently.
That's why we've created an easy-to-use online booking system, so you can schedule appointments whenever it's convenient for you.
Plus, when we're on our way, you'll receive real-time tracking updates, so you're never left wondering when we'll arrive.
We focus exclusively on domestic gas boilers, which means you'll get specialised expertise from a team that truly understands your home's heating needs.
Our comprehensive coverage area extends throughout Eltham and the surrounding Thames region.
Areas In & Around Eltham We Serve

Situated in South East London, Eltham and its surrounding areas form a key part of our service territory.
We're proud to provide local plumbing and boiler services to all Eltham neighbourhoods, from Eltham Park to Well Hall, ensuring every home stays warm and comfortable.
Our team knows these streets like the back of our hand, which means we can get to you quickly when you need us.
- Eltham Park & Progress Estate – A beautiful area with many period properties that we regularly service
- Well Hall & Horn Park – We're familiar with the heating systems common in these neighbourhoods
- Mottingham & New Eltham – Our expertise extends to these nearby communities, where we've helped countless homeowners
We're your neighbours, and we're here to keep your home's heating running smoothly.
Our Gas Safe registered engineers can help you achieve up to 31% savings on your energy bills through smart thermostat installations and optimizations.
Boilers We Can Repair In Eltham

We're experts at repairing all types of domestic gas boilers in Eltham, including popular brands like Vaillant, Worcester Bosch, Glow Worm, and Viessmann.
Whether you've got a combi boiler that's acting up or a system boiler giving you trouble, we'll diagnose and fix the problem efficiently.
With over 25 years of experience working on these trusted brands, we understand exactly what it takes to get your heating system back up and running smoothly.
Combi Boiler Repairs in Eltham
Homeowners in Eltham can rely on Thames Boilers for expert combi boiler repairs and maintenance.
We recognise how frustrating it can be when your combi boiler isn't working properly, which is why we're here to help with common issues like pressure loss, no hot water, or strange noises.
Our experienced engineers know exactly what to look for when troubleshooting combi issues.
Here are the most frequent problems we fix for our Eltham neighbours:
- Water pressure drops and system lockouts
- Kettling sounds caused by limescale buildup
- Frozen condensate pipes during cold weather
We'll diagnose your boiler's problem quickly and explain everything in plain English.
When you're dealing with combi boiler maintenance tips, we're always happy to share our knowledge to help you keep your system running smoothly all year round.
Vaillant Boiler Repairs in Eltham
Experienced Gas Safe engineers at Thames Boilers frequently repair Vaillant boilers throughout Eltham, handling everything from low pressure issues to faulty PCBs.
When you're facing Vaillant boiler problems, we'll help you comprehend what's going on. Here's a quick look at common issues we fix and their typical symptoms:
| Problem | What You Might Notice |
|---|---|
| Low Pressure (F22) | Boiler won't start |
| Flame Failure (F28) | No hot water |
| Fan Issues (F32) | Strange noises |
| Gas Valve Problems | Irregular heating |
| Circulation Issues | Cold radiators |
We're your local Vaillant troubleshooting experts, and we realise how frustrating boiler issues can be. That's why we take time to explain what's wrong and how we'll fix it, ensuring you're comfortable with every step of our repair process.
Worcester Bosch Boiler Repairs in Eltham
Like their Vaillant counterparts, Worcester Bosch boilers can develop issues that require professional attention in Eltham homes. We've helped countless homeowners tackle common Worcester Bosch problems, from low pressure to mysterious error codes.
| Common Issue | Our Expert Repair Tips |
|---|---|
| No Heat/Water | We'll check your pressure, thermostat, and pilot light |
| Strange Noises | We'll inspect for trapped air and limescale buildup |
| Frozen Pipes | We'll thaw and insulate your condensate pipe |
At Thames Boilers, we're well-versed in all Worcester Bosch repair scenarios. Whether you're hearing concerning sounds or facing pressure problems, we'll diagnose and fix the issue promptly. Remember, while some fixes might seem simple, it's always best to let a qualified engineer handle your Worcester Bosch repairs to maintain your warranty and guarantee safety.
Glow Worm Boiler Repairs in Eltham
Throughout Eltham, Glow Worm boilers need occasional repairs to maintain their efficiency and reliability. We've put together a helpful Glow worm troubleshooting guide to help you understand common issues we regularly fix in your area. Whether it's a frozen condensate pipe in winter or a frustrating F28 ignition error, we're here to help.
Here's a quick reference of common Glow Worm issues we handle:
| Fault Code | Issue | Common Symptoms |
|---|---|---|
| F16 | Flame Detection | No heat output |
| F22 | Low Pressure | System shutdown |
| F28 | Ignition Failure | No startup |
| F1/F4 | Frozen Pipe | Winter issues |
| F13 | PCB Problems | Display errors |
Looking for Glow worm maintenance tips? We recommend annual servicing to prevent these common faults and keep your boiler running smoothly. Remember, we're just a call away when you need expert repairs in Eltham.
Viessmann Boiler Repairs in Eltham
In Eltham, we regularly service and repair Viessmann boilers, addressing everything from common flame failures to complex circulation issues. When you're facing Viessmann faults, our experienced team knows exactly what to look for during boiler troubleshooting, ensuring your heating system gets back up and running quickly.
| Common Viessmann Issues | What We Do |
|---|---|
| Flame Loss (F2/F5) | Expert diagnosis and repair of gas supply problems |
| Temperature Problems (A3) | Professional descaling and circulation checks |
| Burner Issues (A6) | Complete ignition system assessment |
| Low Pressure | System rebalancing and leak checks |
We've seen just about every Viessmann fault code there is, and we're ready to help you get your home warm again. Our diagnostic process is thorough but efficient, saving you time and worry.
Baxi Boiler Repairs in Eltham
Servicing Baxi boilers throughout Eltham, we've developed extensive experience diagnosing and repairing common issues that affect these reliable heating systems. When it comes to Baxi boiler troubleshooting, we've seen it all – from low pressure problems to frozen condensate pipes. Our expertise means we can quickly identify and resolve these issues to get your heating back up and running.
| Common Issue | Symptoms | Our Solution |
|---|---|---|
| Low Pressure | Gauge below 1 bar | Pressure top-up, leak check |
| No Hot Water | System not heating | Diverter valve inspection |
| Strange Noises | Banging, gurgling | System bleeding, cleaning |
| Error Codes | Display warnings | Diagnostic assessment |
Regular Baxi boiler maintenance helps prevent these common problems, and we're here to help keep your system running smoothly all year round.
Potterton Boiler Repairs in Eltham
When Potterton boilers need repair in Eltham, we're ready to diagnose and fix the most common issues these systems face. Our team regularly handles everything from cycling fan problems to frozen condensate pipes, ensuring your home stays warm and comfortable.
| Common Fault | What You Might Notice | What We'll Do |
|---|---|---|
| Low Pressure | Error Code E119 | Check for leaks, repressurise system |
| No Hot Water | Cold taps, no heating | Inspect diverter valve, clean heat exchanger |
| Strange Noises | Kettling sounds | Perform chemical flush if needed |
You'll appreciate our straightforward Potterton troubleshooting tips while we work on your boiler. We've seen all the common boiler faults and know exactly what to look for – whether it's a simple pressure drop or a more complex fan issue. Remember, we're just a call away when you need expert help in Eltham.
Ideal Boiler Repairs in Eltham
Beyond our expertise with Potterton systems, we're highly skilled at fixing Ideal boilers throughout Eltham. When it comes to common boiler issues, we've seen it all – from ignition problems to frozen condensate pipes. Our team's extensive experience with Ideal boilers means we can quickly diagnose and resolve your heating troubles.
| Issue | Causes | Our Solution |
|---|---|---|
| No Heat | Faulty Thermostat | Quick Settings Check & Repair |
| Low Pressure | System Leaks | Professional Leak Detection |
| Strange Noises | Trapped Air | System Bleeding & Maintenance |
| Display Errors | Component Failure | Expert Diagnostics & Fix |
Looking for boiler maintenance tips? We recommend annual servicing to prevent unexpected breakdowns and keep your Ideal boiler running efficiently. Trust us to keep your home warm and comfortable, just like we've done for countless other Eltham families.
Alpha Boiler Repairs in Eltham
From faulty sensors to pressure problems, we've mastered the full range of Alpha boiler repairs in Eltham. When it comes to Alpha Boiler Troubleshooting, we've seen it all – from mysterious error codes to those frustrating heating hiccups that leave you in the cold.
| Common Alpha Issues | Symptoms | Our Solution |
|---|---|---|
| E10 Error | Overheating | System flush & thermostat check |
| E20 Code | High pressure | Pressure adjustment & vessel inspection |
| E34 Alert | Low pressure | Leak check & system refill |
| E25 Warning | No water detection | Flow sensor repair |
| E28 Problem | Flue issues | Thorough flue inspection & cleaning |
We'll diagnose these common Alpha issues quickly and get your heating back on track. Our experience means we can spot potential problems before they become major headaches, saving you time and money in the long run.
Ariston Boiler Repairs in Eltham
With years of experience troubleshooting Ariston boilers across Eltham, we've developed expertise in diagnosing and fixing every common fault code. When you're dealing with common issues like low water pressure or ignition failures, our team's here to help get your heating back up and running efficiently.
Here's a quick look at some frequent Ariston fault codes we encounter:
| Error Code | Issue | Our Solution |
|---|---|---|
| 108 | Low Water Pressure | Quick pressure restore |
| 5P1, 5P2 | Ignition Failure | Gas supply check |
| E34 | Air Pressure Switch | Professional testing |
We'll help you understand these maintenance tips and warning signs to prevent future breakdowns. From PCB errors to circulation problems, our experienced engineers know exactly what to look for – and more importantly, how to fix it right the first time.
Biasi Boiler Repairs in Eltham
Our experienced team regularly tackles common Biasi boiler issues throughout Eltham, specialising in the full range of fault codes from ER01 to ER69. When it comes to Biasi boiler maintenance, we have you sorted with expert solutions for everything from pressure problems to heating inconsistencies.
Here's a quick look at some common issues we handle:
| Fault Code | Issue | Our Solution |
|---|---|---|
| ER01 | Ignition Problems | Thorough system check |
| ER02 | Overheating | Immediate safety inspection |
| ER04 | Low Pressure | Pressure system restoration |
| ER07 | No Hot Water | Diverter valve assessment |
| ER12 | Valve Issues | Complete valve servicing |
For reliable Biasi boiler troubleshooting, we're just a call away. Whether you're hearing strange noises or dealing with heating failures, we'll diagnose and fix the problem efficiently, keeping your home warm and comfortable.
Vokera Boiler Repairs in Eltham
Moving beyond Biasi systems, Thames Boilers brings expert knowledge to Vokera boiler repairs throughout Eltham. When it comes to Vokera efficiency, we've seen it all – from simple ignition failures to complex fan issues. We'll help diagnose and fix your Vokera boiler troubles with expert precision.
| Common Issue | Possible Cause | Our Solution |
|---|---|---|
| A01 Error | Gas Supply/Ignition | We'll check gas pressure and clean electrodes |
| A03 Error | Fan Problems | We'll test and replace if needed |
| A40/A41 Error | Low Pressure | We'll identify leaks and rebalance pressure |
Our Vokera troubleshooting process is thorough and methodical. We'll explain everything in plain English, so you'll understand exactly what's happening with your system. From condensate pipe blockages to thermistor faults, we're here to get your heating back on track.
Keston Boiler Repairs in Eltham
Specialising in Keston boiler repairs throughout Eltham, we diagnose and fix common issues from ignition failures to sensor malfunctions. When it comes to troubleshooting Keston faults, we have you taken care of with our expertise and reliable service.
Here's a quick guide to common Keston issues we regularly handle:
| Error Code | Issue | What We Do |
|---|---|---|
| E01 | Ignition Failure | Check gas supply, clean ignition parts |
| E37/F1 | Low Pressure | Fix leaks, rebalance system |
| E05 | Fan Problems | Test connections, replace if needed |
Looking for Keston boiler maintenance tips? We recommend regular pressure checks and annual servicing to prevent unexpected breakdowns. Trust us to keep your Keston running smoothly – we're just a phone call away when you need expert help in Eltham.
Common Boiler Problems In Eltham

In our many years serving Eltham homeowners, we've noticed several boiler problems that keep popping up.
From hot water issues and pressure problems to those mysterious fault codes that appear on your display, these common problems can really disrupt your daily routine.
We'll look at what's causing these issues and, more importantly, how to fix them, so you can get your heating and hot water back up and running quickly.
No hot water but heating is working
During winter months in Eltham, one of the most frustrating boiler problems is when you have heating but no hot water. This issue can leave you shivering during colder days, as having proper heating is essential for comfort. To resolve this, it’s crucial to investigate the system thoroughly, especially if your home relies on unvented hot water cylinder servicing to provide hot water efficiently. Regular maintenance and prompt attention to any unusual noises or leaks can help prevent this problem from recurring.
We recognise how disruptive this can be to your daily routine, especially when you're getting ready for work or trying to wash up after a long day.
If you're experiencing this issue with your combi boiler, it's usually down to either a faulty flow switch or a stuck diverter valve.
These are common heating troubleshooting scenarios we encounter. For conventional boilers, we typically find it's a problem with the motorised valve.
While it might be tempting to try fixing this yourself, we'd strongly recommend against it.
As your local Gas Safe engineers, we're here to diagnose and repair these issues safely and efficiently, getting your hot water back up and running in no time.
Hot water is working, but radiators are not heating up
Many Eltham residents face the frustrating situation of having hot water but no heating from their radiators.
When you're experiencing this common heating system issue, there are a few key areas we'll check during our radiator troubleshooting process.
For combi boilers, we often find it's due to a stuck diverter valve that's not directing hot water to your radiators properly.
If you have a conventional boiler, a faulty motorised valve is usually the culprit.
But before you call us, there's something simple you can check yourself: make sure your programmer is actually set to turn the heating on, and your room thermostat is turned up high enough.
It's a quick fix that could save you time and money – we've seen plenty of cases where that's all it took!
Boiler Pressure gauge keeps going down
Facing a constantly dropping boiler pressure is one of the most common issues we encounter in Eltham homes. If you're finding yourself regularly topping up your boiler's pressure gauge, there's likely a leak somewhere in your system that needs our attention.
When we investigate dropping pressure, we'll first check your external pressure relief valve for any signs of water discharge.
We'll also thoroughly inspect your pipes and radiators for small leaks that might be hard to spot.
Sometimes, it's not a leak at all – we often find that a faulty expansion vessel is the culprit.
Whatever the cause, it's important to get this checked out quickly to prevent any damage to your heating system.
At Thames Boilers, we'll identify the root cause and get your boiler pressure stable again.
Hot water on combi boiler runs hot and cold
Fluctuating water temperature from your combi boiler can turn a relaxing shower into an unpleasant experience.
We recognise how frustrating it can be when you're trying to enjoy a hot shower, only to be surprised by sudden cold bursts of water.
During our combi boiler maintenance visits in Eltham, we often find that this common issue is typically caused by a blocked plate heat exchanger.
If you're experiencing this problem only when using your shower, it's likely due to a faulty shower cartridge instead.
As part of our hot water troubleshooting process, we'll thoroughly inspect your system to pinpoint the exact cause.
The good news? Both issues are completely fixable, and we can help get your hot water running smoothly again.
Don't let temperamental water temperatures disrupt your daily routine – let's solve this together.
There's a fault code on my boiler
When your boiler displays a fault code, it's sending you an important message about what's wrong. At Thames Boilers, we recognise how frustrating these mysterious codes can be, but they're actually quite helpful for fault code analysis and quick diagnosis.
Here's a handy troubleshooting tip: try searching online for your boiler's make and the specific fault code (for example, "Vaillant F75"). This can give you a good idea of what's happening before you give us a call.
While some fault codes indicate minor issues that might resolve themselves, others could signal more serious problems that need professional attention.
We're always here to help decode these messages and get your heating back up and running. After all, nobody wants to be left puzzling over a cryptic code when they just want a warm home!
Boiler is making a loud banging sound when it turns on
A loud banging noise from your boiler can be quite alarming, especially when it fires up. If you're experiencing this in your Eltham home, we recognise how unsettling it can be.
Let's look at what's causing it and some boiler maintenance tips to help.
This banging noise often happens when there's no proper water circulation in your system, which causes overheating. The most common culprit is a faulty pump that's not moving water through your system effectively.
Sometimes, it could be trapped air or a blocked main heat exchanger. While these banging noise solutions might sound technical, they're actually quite common issues we deal with regularly.
If you're hearing these concerning sounds, it's best to get them checked quickly to prevent any potential damage to your heating system.
Book Your Eltham Boiler Repair Online 24/7

Save time and hassle by booking your Eltham boiler repair online in just a few clicks.
Our simple booking system is available 24/7, allowing you to schedule an appointment at your convenience.
Once booked, you'll receive instant confirmation and real-time tracking updates when we're on our way.
Book your boiler repair appointment now
Frequently Asked Questions
What Happens if My Boiler Breaks Down During the Repair Warranty Period?
We'll take care of your boiler if it fails during the warranty coverage period. Just give us a call, and we'll restart the repair process right away to get your heating back up and running.
Do You Offer Payment Plans or Financing Options for Boiler Repairs?
We don't currently offer any payment plans or financing alternatives for our repair services. We believe in transparent pricing and recommend discussing your needs upfront, so we can find the most suitable solution for you.
How Long Does a Typical Boiler Repair Appointment Take?
Most boiler repairs take 1-2 hours depending on the complexity of common boiler issues. We'll always diagnose the problem first and keep you informed throughout the process while following best boiler maintenance tips.
What Should I Check Before Calling for a Boiler Repair?
Before calling us, check your boiler's pressure gauge, make certain it's powered on, verify radiators are bled, and reset any error codes. These common boiler maintenance tips often solve simple issues without needing professional repairs.
Can I Get a Repair Cost Estimate Before Booking an Appointment?
We can't provide repair estimates before an appointment as we need to diagnose the issue in person. However, you're welcome to book online, and we'll always discuss costs with you before starting any work.

