Boiler leaking water from underneath the casing or from internal components.

Safety: Isolate electrical power before investigating leaks. Hot water and surfaces can cause burns.

• Identify leak source: Remove the front cover (if user-accessible per manual) and visually trace where water originates. Do not disturb gas components.
• Check pressure relief discharge: Observe the copper discharge pipe outside. Continuous dripping indicates a faulty pressure relief valve or expansion vessel issue.
• Tighten unions: If safe and accessible, gently tighten any weeping compression joints on heating or DHW pipes.
• Technician – replace leaking components: Replace the Beretta plate heat exchanger, automatic air vent, or primary heat exchanger if they are the source of the leak.
• Dry and test: After repair, dry the area, refill and repressurise the system, then monitor for further leaks.