How do I know if my boiler needs replacing rather than repairing? +
If your boiler is over 10 to 15 years old, breaks down frequently, or has an efficiency rating below A (90%+), replacement is usually more cost-effective than repeated repairs. A single repair costing over £400 on an older boiler is often not worthwhile. Modern condensing boilers are up to 30% more efficient than older models, so a new boiler can pay for itself through lower gas bills within 5 to 7 years.
How long does a boiler service take? +
A standard annual boiler service takes 30 to 45 minutes. The engineer will inspect the boiler internals, check gas pressure and flow rate, carry out a flue gas analysis, and test all safety devices. You will receive a service record which you should keep as proof for your warranty. The engineer should also flag any parts showing early signs of wear.
What are the signs of carbon monoxide from a boiler? +
Warning signs include a yellow or orange boiler flame instead of blue, dark staining around the boiler, increased condensation on windows, and a pilot light that frequently goes out. Symptoms of carbon monoxide exposure include headaches, dizziness, nausea and confusion. If you suspect a carbon monoxide leak, open windows, leave the property immediately and call the Gas Emergency Service on 0800 111 999. Fit a CO alarm near your boiler — they cost under £20 and save lives.
Should I get my boiler serviced every year? +
Yes — an annual boiler service is essential for safety, efficiency, and warranty compliance. A service checks for carbon monoxide leaks, verifies the flue is clear, and ensures all components are working safely. Most boiler manufacturers require an annual service to maintain your warranty, so missing one could void your cover entirely. A well-serviced boiler also uses less gas, saving you money.
Which boiler brands do your engineers in Preston work on? +
Our boiler engineers in Preston work on all major brands including Worcester Bosch, Vaillant, Baxi, Ideal, Viessmann, Glow-worm, and Potterton. Many are manufacturer-approved installers, meaning they can offer extended warranties on new installations. If you have a less common boiler brand, let us know and we will match you with an engineer who has experience with your specific model.
Is a leaking boiler dangerous? +
A leaking boiler should always be taken seriously. While a small drip from a pressure relief valve may indicate a minor issue, water leaking from the boiler casing can damage internal electrics and create a safety hazard. Never attempt to repair a boiler leak yourself.