Commercial Boiler Repair

Your Trusted Commercial Boiler Repair Partner

Prompt and Reliable Commercial Boiler Repair Services for Your Business

PES Heating & Plumbing offers fast, dependable boiler repair services tailored to meet the demands of commercial and industrial properties across London and the South East. We understand that a boiler breakdown can disrupt your business operations, affecting productivity, comfort, and even safety.

Our team is dedicated to providing swift responses to minimise downtime and get your heating system back on track as quickly as possible. With over 20 years of experience, we specialise in diagnosing and repairing issues in various boiler models and systems, ensuring that your equipment operates reliably and efficiently to meet the unique demands of your business.

12 Month Guarantees

Transparent Pricing

24 Hours Emergency Gas And Boiler Repairs

20+ Years Experience

Experienced Engineers Ensuring Safe and Lasting Repairs

Our team of Gas Safe registered engineers is highly trained and experienced in handling all types of commercial boiler repairs, from minor adjustments to major component replacements. At PES Heating & Plumbing, we prioritise safety and efficiency, ensuring that every repair is carried out with meticulous attention to detail. We conduct a thorough assessment to identify the root cause of the problem and use high-quality parts and industry-standard techniques to provide lasting solutions.

Our engineers have extensive knowledge of a wide range of boiler systems, enabling them to tackle even the most complex repairs with confidence and expertise. Trust us to restore your heating system to peak performance, helping you maintain a safe, comfortable, and productive environment for your staff and clients.

What Our Commercial Boiler Repair Service Covers in London

When a boiler fails in a commercial building, the knock-on effects are immediate: cold offices, no hot water in washrooms or kitchens, and in some premises a duty of care to vulnerable people. Our commercial boiler repair service is built around finding the true cause of the fault and fixing it properly, not just getting the boiler to fire for another week.

A typical repair visit includes:

Checking the fault history and error codes on the boiler and any building controls.
Testing gas pressure, combustion and flue performance to confirm the boiler is safe to run.
Inspecting ignition, burners, fans, pumps, valves, sensors and controls.
Checking the wider system, including pressurisation units, expansion vessels and pipework, where these are causing the boiler to lock out.
Replacing failed components and recommissioning the boiler.

Keeping the building safe while repairs are arranged

If a boiler cannot be fixed on the first visit, for example because a part has to be ordered, the engineer will explain what has failed, leave the installation in a safe condition and agree the next steps with you. Where a building has more than one boiler, it is often possible to keep part of the plant running so that some heat and hot water remain available until the work is completed.

Where a boiler is beyond economic repair, we can advise on commercial boiler installations instead.

Commercial Boiler Repair Across London and the South East

We repair boilers in commercial premises throughout London, from offices and hotels in Westminster and Kensington and Chelsea to mixed-use buildings in Islington, high-rise sites around Canary Wharf and business parks in Croydon. We also cover Kent, Surrey and Sussex for clients with sites outside the capital.

Who we repair boilers for

Offices, where a heating failure affects staff comfort and productivity.
Hotels and hospitality venues that need reliable hot water around the clock.
Schools and colleges, where heating has to be working before the school day starts.
Care homes and healthcare premises, where warmth is part of resident welfare.
Residential blocks with communal boiler plant, managed by landlords and managing agents.

How a Commercial Boiler Repair Is Carried Out

Report the fault: call us and describe the symptoms, any error codes and how many boilers serve the building.
Diagnosis on site: a Gas Safe registered engineer attends, makes the installation safe and identifies the cause.
Written quote: if parts or further work are needed, you receive a transparent written quote before the repair goes ahead.
Repair: we schedule the work around your opening hours, with out-of-hours attendance where needed.
Testing and handover: the boiler is recommissioned, combustion is checked and the system is run up to temperature before we leave.

Safety and compliance

All gas work is carried out by Gas Safe registered engineers in line with the Gas Safety (Installation and Use) Regulations 1998. If we find a dangerous installation, we follow the Gas Industry Unsafe Situations Procedure and explain clearly what needs to happen before the boiler can be used again. Electrical faults in boiler controls are handled by our NICEIC approved electricians. Regular commercial gas servicing is the best way to reduce future breakdowns.

What Affects the Cost of a Commercial Boiler Repair

We do not quote fixed prices before diagnosing a fault, because commercial boilers vary so much. The factors that shape the cost include:

The make, model and age of the boiler, and how easily parts can be sourced.
Whether the plant is a single boiler or a modular or cascade arrangement.
The component that has failed and the labour needed to replace it.
Access to the plant room, including rooftop plant and parking in central London.
Whether the call-out is an emergency or out of hours.
Any related faults found in pumps, controls or pressurisation equipment.

Once the fault is diagnosed, you receive a written quote setting out the parts and labour involved, so you can approve the work with full knowledge of the cost.

Why Businesses Choose PES for Commercial Boiler Repair

PES Heating and Plumbing is a family-run business with more than 20 years of experience on commercial heating systems in London. Our commercial gas engineers are Gas Safe registered, our electricians are NICEIC approved, and we hold Safe Contractor accreditation.

24/7 emergency cover for boiler breakdowns
A 12-month guarantee on our workmanship
Transparent written quotes before work starts
Coverage across London and the South East

To report a breakdown or request a quote, call 0203 439 9474.

Contact PES Heating & Plumbing for 24/7 Emergency Repairs and Transparent Pricing

At PES Heating & Plumbing, we know that boiler issues don’t always occur during regular business hours. That’s why we offer 24/7 emergency repair services, so you can count on us whenever you need urgent assistance. We’re committed to providing clear and transparent pricing with no hidden fees, giving you peace of mind and control over your repair costs. Every repair we complete is backed by our 12-month guarantee, ensuring the quality and durability of our work.

Contact us today to schedule a repair, request a detailed quote, or learn more about our commercial boiler repair services. With PES Heating & Plumbing, your business is in capable hands, with a team that’s dedicated to keeping your heating system running smoothly and efficiently.

Where we provide commercial boiler repair

We provide commercial boiler repair across London and the South East. See our full coverage area for commercial plumbing in London, Sussex, Surrey and Kent, or call 0203 439 9474.

Accreditations

FAQs

How quickly can PES respond to a commercial boiler breakdown in London?

PES Heating and Plumbing provides 24/7 emergency commercial boiler repair across London. For emergency breakdowns, we aim to respond as quickly as possible — often on the same day. For non-urgent faults, we can typically attend within a few working days. Call 0203 439 9474 at any time to report a commercial boiler fault and we will confirm our attendance time.

Do you repair all makes and models of commercial boiler?

Yes. Our Gas Safe registered engineers are experienced with all major commercial boiler brands and types, including condensing boilers, modular systems, cascade arrangements, and combination boilers from manufacturers including Worcester Bosch, Ideal, Vaillant, Potterton, Remeha, Hamworthy, and others. If parts are required, we source them promptly to minimise downtime. Call 0203 439 9474.

What are the most common commercial boiler faults you repair?

Common commercial boiler faults we repair include burner failures, heat exchanger issues, pump failures, pressure problems, PCB faults, flue blockages, motorised valve failures, and controls and thermostat issues. We carry a comprehensive range of common parts to enable same-day repair wherever possible. Call 0203 439 9474 to report your fault and we will advise on likely diagnosis and attendance time.

Do you provide a report after carrying out a commercial boiler repair?

Yes. Following every commercial boiler repair, we provide a written report detailing the fault identified, the work carried out, parts replaced, and any further recommendations for the system. This documentation is important for planned maintenance records, insurance, and building management requirements. Call 0203 439 9474.

Should I repair or replace my commercial boiler?

This depends on the age, condition, and repair history of the boiler. As a general guide, if repair costs exceed 50% of the replacement cost, or if the boiler is over 15 years old and requiring repeated repairs, replacement is usually the more cost-effective long-term solution. We provide honest, impartial advice on repair versus replacement at the point of fault diagnosis. Call 0203 439 9474 for an assessment.

What should I do if our commercial boiler stops working or we smell gas?

If you smell gas, turn off the gas supply at the emergency control valve if it is safe to do so, ventilate the area, avoid using electrical switches and call the National Gas Emergency number on 0800 111 999. Once the supply has been made safe, call PES on 0203 439 9474 to arrange a repair. If the boiler has simply stopped, note any error code shown and avoid repeatedly resetting it, as this can mask the underlying fault.

Do you repair communal boilers in residential blocks?

Yes. We repair communal boiler plant in residential blocks and mixed-use buildings for landlords and managing agents across London. Communal systems often involve several boilers, shared pumps and pressurisation units, so we look at the whole plant room rather than one appliance in isolation. We can provide written quotes for approval before work starts and documentation for your building records afterwards. Call 0203 439 9474 to report a communal heating fault.

Can repeated boiler breakdowns be caused by the heating system rather than the boiler?

Yes. A boiler that keeps locking out is often reacting to a problem elsewhere, such as a failing pump, a faulty pressurisation unit, an expansion vessel that has lost its charge, sludge in the pipework or poorly set controls. Replacing boiler parts will not cure these issues. Our engineers check the wider system during a commercial boiler repair so the real cause is found and fixed. Call 0203 439 9474 if your boiler keeps failing.