Lockout (Red) flashing Your boiler has sensed it is getting too hot and has shut itself down as a safety precaution.
Your boiler has sensed it is getting too hot and has shut itself down as a safety precaution.
What to check first
- Check that all radiator valves are fully open to allow water to flow.
- Ensure the system pressure is between 1 and 1.5 bar on the pressure gauge.
- Turn the control knob to the 'Reset' position for five seconds and then back to 'On'.
Parts commonly replaced
- Overheat Thermostat
- Circulation Pump
- Thermistor (NTC Sensor)