Vaillant Boiler Repair & Boiler Service London

Your Vaillant boiler is a precision piece of high-quality, German engineering. When it breaks down, don’t trust just anybody to fix it.

Vaillant Boiler Repair & Boiler Service London

As Vaillant boiler repair London experts, Heatsy are here to help you keep your boiler running efficiently and reliably. 

We have extensive knowledge of Vaillant boiler repairs and their most common faults. Some of our engineers are ex Vaillant technicians, and they have attended multiple Vaillant training days on all types and any age of Vaillant boilers, from the modern ecoTec and ecoFit, to the older Turbomax and ecoMax models.


What we guarantee to deliver:

Premium 24/7 Emergency Service
Skilled Gas Safe Registered Emergency Boiler Engineers
DBS Cleared Engineers
12 Month Workmanship Guarantee
Honest Upfront Pricing

What You Never Need To Worry About With Heatsy:

AWOL Engineers Or Unanswered Phone Calls
Unqualified Or Illegal Gas Engineers
Dishonest Or Dangerous People In Your Family Home
Being Left Alone Or Ignored In An Emergency
Hidden Extra Fee’s Like Parking Or Travelling

Why Heatsy is Your First Choice For Vaillant Boiler Repairs In London

24/7 -  We’re available for emergency boiler repairs whenever your Vaillant boiler needs us. We guarantee to attend on the same day if needed.

Vaillant Advance PRO’s - We’re proud to be trained and accredited by Vaillant. We know how the machines work, so we can save you time by quickly finding the fault.

Value -  Time is our most valuable asset. We won’t ask you to waste your’s waiting at home all day. We’ll give you an AM or PM time slot, a 30 minute heads up text when we’re en route, and attend at a time that’s convenient for you.


Common Vaillant Boiler Issues

Vaillant boilers are generally very reliable, but a few common issues can occur over time. Here are some of the most common Vaillant boiler faults we repair:

F32 Vaillant Fan Fault. The Vaillant F.32 fault code relates to the fan. Just like the pump, the Vaillant fan speed can be adjusted either during the commissioning stage of the installation, or as part of your Vaillant boiler service.

F75 Vaillant Pump Fault. The Vaillant ecoTec F.75 fault code relates to the pump. As discussed earlier, this must be adjusted and set correctly to ensure it’s not working harder than necessary to ensure long-lasting and trouble-free performance.

F22 Low Pressure Fault. The Vaillant F22 fault code relates to system pressure. This one is usually due to either a leak on your heating system or a dirty system causing the pressure sensor to be blocked. If the latter is an issue, on older Vaillant ecoTec boilers, we can install a kit designed to move the pressure sensor away from the pump, stopping dirt from being forced into the sensor. An adequate Vaillant boiler service will include checking the fault history to see if this fault has occurred frequently, and checking the water to see if it needs to be cleaned

F62 Gas Valve Fault. The Vaillant F62 fault code relates to the resistance on the gas valve coils. The boiler has detected a small amount of gas passing after the valve has shut, which is potentially very dangerous. Often the fault is the PCB, but it can mean that there is a build up of gas within the combustion chamber. During a proper Vaillant boiler service, an engineer experienced with Vaillant boilers will check to make sure the gas valve is closing properly, and also clean the sensors and advise if they need replacing.


What Happens When I Book an Expert Vaillant Boiler Repair by Heatsy?

Here’s how it works:


Book your Heatsy Vaillant boiler repair London by clicking here.


One of our expert engineers attends and quickly repairs your Vaillant boiler.


You enjoy the rest of your day knowing that your boiler is safe, and working efficiently.


Vaillant Boiler Repair & Boiler Service London

With over 10 years of experience as an accredited installer of Vaillant boilers, Heatsy Ltd is the leading authority when it comes to repairing Vaillant boilers.

We take pride in offering a prompt and reliable service, with a 24/7 emergency call-out service available. Our engineers will quickly diagnose any faults and carry out the necessary repairs to get your boiler back up and running as soon as possible.


But don't just take our word for it - here's what some of our satisfied customers have to say:

"I had a problem with my Vaillant boiler and contacted Heatsy Ltd. They were able to diagnose the issue quickly and had my boiler repaired in no time. I was impressed with their professionalism and attention to detail."

- John

"I had a terrible experience with another local heating company who promised to fix my boiler but ended up making the problem worse. When I contacted Heatsy Ltd, they were able to fix the issue and restore my faith in heating companies."

- Sarah


Emergency Boiler Repair London

At Heatsy Ltd, we use only genuine Vaillant parts for our repairs, ensuring that your boiler is repaired to the highest standard and that your boiler will continue to work efficiently and safely. We offer transparent and upfront pricing, with no hidden costs or charges, so you can be confident that you're getting value for your money.

Don't let a faulty boiler disrupt your day-to-day life - trust the experts at Heatsy Ltd to provide you with a top-notch Vaillant boiler repair service. Contact us today to schedule your Vaillant boiler repair.


Vaillant Boiler Service London

To keep your energy-efficient Vaillant boiler working at its optimum level, you’ll need to get it serviced by Vaillant experts.

Book your Vailant Boiler Service London

Just like a premium brand car, Vaillant boilers require regular and adequate servicing by engineers who understand how they work to help maintain their incredible performance.

For instance, within the engineer level on the onboard diagnostics, did your installer let you know that we can adjust the pump speed to match the resistance of your heating system? A pump that is ‘spinning’ too fast will not only use more energy, but it will also be noisier, and as the water is moving more quickly, it will require more energy to heat it.

This is just one of the many settings that are adjustable to match the needs of your unique Vaillant boiler installation.


Vaillant Boiler Services in London from the experts at Heatsy

Heatsy Ltd is the ideal choice for your Vaillant ecoTec boiler servicing needs for many reasons:

Experienced Engineers: Our engineers are highly trained and experienced, ensuring that they can service your boiler quickly and effectively.

Quality Service: We take pride in providing a high-quality service that exceeds our customers' expectations.

Value-Based Pricing: We offer competitive pricing for all our services, ensuring you get great value for your money.

Quick Response Time: We understand that boiler issues can be urgent, so we offer a quick response time to all of our customers.

Vaillant Advance PRO Engineers: We’re trained and accredited by Vaillant, so we know how to properly work on your Vaillant boiler.


What Does an Average Vaillant ecoTec Boiler Service Involve?

Here's what you can expect from a typical Vaillant ecoTec boiler service:

The engineer will conduct a visual inspection of the boiler, checking for any signs of wear and tear or damage.

Check for Leaks - The engineer will inspect the boiler's pipework and check for any leaks or signs of corrosion.

Check Safety Devices - Your engineer will check that your boiler reverts to the correct fault state during an unsafe situation.

Check Flue and Ventilation - The engineer will inspect the flue and ventilation system to ensure it's operating correctly and not posing a danger to occupants.

Check for Carbon Monoxide - The engineer will use a flue gas analyser to check the emissions and make adjustments where necessary.


Here are the additional checks you’ll get with an Expert Heatsy Vaillant boiler service London

Check Gas Pressure - Your Heatsy engineer will check the gas pressure and ensure it's at the correct level.

Check For Gas Leaks - Your Heatsy engineer will check for gas leaks inside the boiler, to ensure the gas valve has fully closed and prevent a potentially dangerous build-up of gas inside the combustion chamber.

Clean Burner and Heat Exchanger - Your Heatsy engineer will clean the burner and heat exchanger, removing any dirt or debris that may have built up.

Replace G10 Door Seal - Your Heatsy engineer will replace the door seal from the combustion chamber, and check the heat exchanger insulation for cracks or damage. These checks are extremely important and can result in fires, or carbon monoxide leaks if not checked regularly

Check and Adjust Pump Speed - During our service we will check the delta T of your heating system so we can adjust the pump speed to be set efficiently for your heating system.

Check and Adjust fan speed - The fan speed relates directly to the gas consumption, we will check and adjust the RPM of the fan to ensure that your Vaillant boiler is not burning more fuel than is necessary.

Check and Adjust Boiler Output - Your Vaillant ecoTec boiler KW output can, and should be adjusted to meet the demands of your system. If the KW is too high, your boiler will cycle on and off frequently, wasting energy and causing unnecessary wear and tear to the boiler's components.

Check The Water Quality - Dirty water is about the worst thing for not only your Vaillant boiler but for all heating appliances. A clean system will mean less corrosion, higher efficiency, and a longer-lasting boiler. As part of your Heatsy Vaillant boiler service, we will check the system water for corrosion, the PH levels, and the amount of inhibitor in the system. We will give you a water quality record with recommendations to ensure your Vaillant boiler is adequately protected.

Clean Condense Trap - We will remove and clean the condense trap to ensure that there are no blockages which will result in poor performance and damage to your Vaillant boiler.

Test Controls - The engineer will test the boiler's controls to ensure they're working correctly and not faulty.

Issue Service Certificate - After completing the service, the engineer will issue a service certificate with pictures of each check to prove that the boiler has been serviced.


What’s Happens When I Book a Vaillant Boiler Service By Heatsy?

Here’s how it works:


Book your Heatsy Vaillant boiler service by clicking here.


One of our expert engineers attends and thoroughly inspects your Vaillant boiler.


Sleep easy at night knowing your boiler is safe and working efficiently.


How Often Should You Service Your Vaillant ecoTec Boiler?

Vaillant recommends that homeowners have their ecoTec boiler serviced annually to keep it running smoothly and efficiently. Regular servicing not only helps to prevent breakdowns but also ensures that the boiler is operating safely and not posing a danger to occupants.

As the system and boiler age, the settings must be adjusted to ensure your Vaillant boiler is still performing adequately for your system.

Vaillant ecoTec boilers are an excellent choice for homeowners who want an energy-efficient, reliable, and high-performance heating and hot water solution for their homes. However, it is essential to ensure that your boiler is serviced regularly by a professional heating engineer to ensure its safety, efficiency, and longevity. Doing so lets you enjoy the full benefits of your Vaillant ecoTec boiler and ensure that it provides you with reliable heat and hot water for many years.

As a homeowner, it is crucial to understand the significance of regular boiler servicing. Neglecting to maintain your boiler can lead to many issues, from energy inefficiency to potential safety hazards.



Areas We provide our 5-Star Vaillant boiler repair & boiler service to include:

Balham. Battersea. Biggin Hill. Blackheath. Brixton. Chelsea. Clapham. Croydon. Crystal Palace. Dulwich. Hammersmith & Fulham. Herne Hill. Kensington. Kingston upon Thames. Lambeth. Lewisham. Merton. Mitcham. Pimlico. Putney. Selhurst. Streatham. Tooting. Wandsworth.Westminster. Wimbledon

Addiscombe. Beckenham. Beddington. Carshalton. Caterham. Chaldon. Coulsdon. Epsom. Goddinton. Godstone. Kenley. Keston. Merstham. Oxted, Purley. Redhill. Reigate. Sanderstead. Selsdon. Shirley. South Croydon. Sutton. Sydenham. Warlingham. West Wickham. Westerham. Whyteleafe.

Bexley. Bromley. Dartford. Farnborough. Orpington. Sevenoaks