Boiler Pump Replacement

What boiler pump replacement covers

A failed circulation pump can cause cold radiators, hot water issues, boiler lockouts, or noisy pipework. Boiler pump replacement is designed to get your system moving properly again, with clear steps and checks throughout.

• Confirming the fault with symptoms, boiler readings and component tests
• Isolating the system safely and managing water loss where needed
• Removing the failed pump and fitting a suitable like-for-like replacement (or approved equivalent)
• Checking electrics, pump settings and correct direction of flow
• Re-pressurising (sealed systems) and bleeding air from the circuit
• Functional testing for stable heating, hot water performance and normal boiler operation
• Basic safety and performance checks before sign-off (gas work completed by a Gas Safe registered engineer where required)

When this service is most relevant

You may benefit from a boiler pump replacement if:

• Radiators stay cold or only heat up in patches, even after bleeding
• The boiler fires but quickly shuts down or shows circulation-related fault codes
• You can hear grinding, humming or rattling from the pump area
• Heating works intermittently, especially when demand is high
• The system struggles to heat up after being off for a while

How the service is delivered

The visit typically starts with fault diagnosis to confirm the pump is the cause, not a control, wiring, valve or blockage issue. Once confirmed, the pump is isolated, replaced, and the system is refilled and vented to remove trapped air.

You will be kept informed on what has been found, what is being replaced, and any system condition issues that could affect reliability, such as sludge, sticking valves, or incorrect pump settings.

After the replacement

Once the new pump is fitted, the system is tested through heating and hot water demand to confirm steady circulation. If there are follow-on risks, such as contamination or air ingress, you will get practical advice on next steps to prevent repeat failures and improve system performance.