Start with a diagnosis, not the age alone
A boiler fault does not automatically mean you need a replacement. Ask a suitably qualified Gas Safe registered engineer to identify the cause and explain the repair options. Compare the repair cost, parts availability, condition, efficiency and your heating needs before deciding.
Frequent breakdowns
Repeated faults and disruption can make replacement worth considering. Ask whether the faults have a common cause, such as a problem elsewhere in the heating system, before assuming a new boiler will solve everything.
Pressure loss or unusual noises
Pressure loss, banging or kettling needs investigation. Causes can include leaks, component faults or circulation problems. Keep a note of symptoms and fault codes, and leave internal checks to a qualified engineer.
Higher bills
Heating bills depend on the weather, tariff, building insulation, controls and use as well as the boiler. A newer boiler may help, but a saving or payback period cannot be guaranteed without assessing your home and current appliance.
Safety concerns come first
If you suspect a gas leak or carbon monoxide, leave the property and seek emergency help from outside. Do not operate electrical switches or use a flame. For a gas emergency in Great Britain call 0800 111 999; call 999 if someone is seriously unwell or in immediate danger. If you think you have symptoms of carbon monoxide poisoning, get urgent medical advice through NHS 111; call 999 for severe symptoms. Do not use the appliance again until it has been checked and made safe. See the NHS guidance on carbon monoxide poisoning.
Get a written specification
A replacement quotation should explain the proposed boiler, any system or controls work, installation scope and applicable warranty terms. Installation time and warranty length depend on the product and the work required. Gas work must be carried out by a suitably qualified Gas Safe registered engineer.