Boiler Heat Exchanger Repair

What boiler heat exchanger repair covers

A heat exchanger fault can cause poor heating, hot water problems, lockouts, unusual noises, or repeated fault codes. This service is designed to get to the root cause and restore safe operation.

• Fault finding and fault code interpretation
• Testing related components (pumps, valves, sensors and controls)
• Repair where possible, or heat exchanger replacement where appropriate
• Cleaning and system checks where contamination may be contributing
• Gas safety checks and combustion analysis (as applicable)
• Clear explanation of findings and options before work proceeds

When this service is the right fit

This service is most relevant if your boiler is losing pressure, kettling (rumbling), overheating, switching off, or delivering intermittent hot water. It is also suitable where there are signs of leaks or corrosion around the boiler, or where repeated call-outs suggest an underlying issue. For landlords and small commercial sites, it helps reduce downtime and supports reliable day-to-day heating and hot water.

How the work is carried out

The visit starts with structured diagnostics to confirm whether the heat exchanger is at fault, or if another component is causing similar symptoms. You will be advised whether repair is viable, or whether replacement is the safer and more cost-effective route. All gas work is carried out by a Gas Safe registered engineer, with checks completed before the boiler is returned to service.

What happens after the repair

Once the boiler is running correctly, you will receive practical guidance on next steps, such as monitoring pressure, improving system cleanliness, or addressing underlying causes like sludge or limescale. If the fault indicates wider system issues, you will be given clear options to prevent repeat breakdowns and protect efficiency. Where replacement parts are fitted, final checks confirm safe operation and stable performance.