Your boiler works hard to keep your home warm and your water hot—especially during London’s long winter months. Yet, it’s easy to forget about this vital system until it breaks down. That’s where regular gas boiler servicing comes in. At Citywide Plumbers, we offer expert, reliable, and safe boiler servicing to help prevent costly repairs and keep your system running smoothly all year round.
This guide explains what a gas boiler service involves, why it’s necessary, how much it costs, and why Citywide Plumbers is your trusted partner in London.
What is a Gas Boiler Service?
A gas boiler service is a thorough inspection, cleaning, and testing of your boiler and its components. It ensures your system is:
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Working efficiently
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Safe to use
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Not leaking dangerous gases like carbon monoxide
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Operating at optimal pressure
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Free of blockages, sludge or corrosion
Think of it as an annual health check for your boiler. It helps identify problems before they turn into expensive breakdowns.
What’s Included in Our Boiler Service?
When you book a boiler service with Citywide Plumbers, our Gas Safe registered engineer will:
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Check the boiler flame and burner
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Inspect the heat exchanger
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Clean internal parts if necessary
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Examine the flue and ventilation
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Check gas pressure and flow
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Test safety devices and carbon monoxide levels
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Look for any signs of wear, corrosion, or leaks
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Confirm system controls are working correctly
We follow a detailed checklist to make sure nothing is missed. You’ll receive a service record afterwards, giving you full peace of mind.
Why Should You Service Your Boiler Annually?
An annual service is recommended for all gas boilers. Here's why it’s important:
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Safety: Faulty boilers can leak carbon monoxide, which is odourless and deadly. Servicing reduces that risk.
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Efficiency: A serviced boiler uses less gas, lowering your energy bills.
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Prevention: Detect and fix issues before they escalate into breakdowns.
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Warranty Validity: Most boiler warranties require annual servicing.
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Legal Compliance: Landlords must service boilers in rental properties annually by law.
Our team ensures your boiler complies with all safety standards and manufacturer guidelines.
How Much Does a Boiler Service Cost in London?
At Citywide Plumbers, our standard boiler service starts from £80 to £120, depending on the type and age of the system. Combination (combi) boilers, system boilers, and conventional units may vary slightly in complexity.
We keep our pricing transparent. There are no hidden charges and we’ll always confirm the cost before we begin any work.
Gas Safe Engineers You Can Trust
Every one of our engineers is Gas Safe registered and carries full certification. We never cut corners and treat every customer’s home with respect. Whether your boiler is old or brand new, we’re trained to handle all makes and models.
Citywide Plumbers doesn’t just offer technical skill—we deliver a professional, tidy, and courteous service every time.
Signs Your Boiler Might Need a Service Sooner
Although annual servicing is standard, you should book a check-up sooner if you notice:
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Unusual noises (banging, kettling)
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Inconsistent hot water
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Leaks or dripping water
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Yellow pilot light instead of blue
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Strange smells around the boiler
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Poor radiator performance
Early servicing can prevent breakdowns and ensure your home stays safe.
Landlord Gas Boiler Services
If you’re a landlord, you have a legal duty to ensure your rental property's gas appliances, including boilers, are safe. This includes:
Citywide Plumbers provides full landlord services, including inspection records and certificates for compliance.
When is the Best Time to Book a Service?
The ideal time to service your boiler is in late summer or early autumn—before the cold season hits. This way, your system is ready when you need it most, and you avoid long waiting times during the busy winter period.
Why Choose Citywide Plumbers for Your Boiler Service?
We’re proud to be one of London’s most reliable plumbing and heating specialists. With decades of experience and a genuine passion for safety and service, we offer:
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Certified Gas Safe engineers
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Competitive fixed pricing
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Fast bookings and punctual arrivals
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Respect for your home and time
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Full coverage across London
We’re not a faceless franchise—we’re local, trusted, and here to help.
Contact Us to Book Your Gas Boiler Service
Call: 02038928545
Email: info@citywideplumbers.co.uk
Whether you're due for your annual check or have concerns about your boiler’s performance, our friendly team is ready to assist.