Thermostat displays E14 and the app shows ‘Over-temperature protection active’; heating is shut down.

Safety: Hot water and surfaces can cause burns. Isolate power to the boiler and control module before touching any pipes or wiring.

• Allow system to cool: Wait until pipes and radiators are cool to the touch.
• Check boiler pressure and operation: Ensure the boiler is not locked out with its own error; reset if necessary following the boiler manual.
• Inspect flow sensor: Confirm the Ngenic flow sensor is correctly attached and not near another heat source that could cause false readings.
• Review max temperature settings: In the app, verify that maximum flow temperature and safety limits are correctly configured for your system.

If E14 recurs frequently, have a heating professional check the boiler/heat pump and the Ngenic flow sensor for faults.