Boiler leaking water from underneath the casing or from pipe connections, puddles forming below the Worcester furnace/boiler.

Safety first: Switch off electrical power and, if leak is significant, close the boiler isolation valves and the main water supply. Water near electrics is dangerous.

Homeowner checks:

• Place a tray or towels under the boiler to contain water.
• Check visible pipe joints below the boiler for slow drips; gently tighten compression nuts by a quarter turn if obviously loose (do not overtighten).
• Note where the water appears to come from and take photos for the engineer.

Engineer actions:

• Remove the case and inspect the pump, automatic air vent, diverter valve, and heat exchanger for signs of leakage.
• Replace leaking components such as the Worcester pump head, AAV, or seals.
• If the primary heat exchanger is leaking, assess whether replacement is economical versus boiler replacement.
• Refill, bleed, and pressure-test the system after repairs.

Do not ignore leaks; they can damage the PCB and other electrical components inside the boiler.