Boiler leaking water from underneath the casing or from pipe connections

Danger: Water leaks can damage electrical components and the building. Isolate power before approaching the boiler. Do not remove the boiler case yourself.

• Turn off power: Switch off the boiler at the fused spur to prevent electrical hazards.
• Turn off water if leak is heavy: Close the cold water isolation valve to the boiler and, if necessary, the main stopcock to limit damage.
• Contain the leak: Place a tray or towels under the boiler to catch drips.
• Do not ignore: Even small leaks can corrode the heat exchanger and PCB over time.
• Engineer actions: The engineer will remove the case, identify the leak source (plate heat exchanger, primary heat exchanger, automatic air vent, or fittings), and replace the faulty component or reseal joints.