Check your circuit breaker has not tripped. Contact your installer or local engineer to check if the boiler has power.
This is usually because the internal High Limit Thermostat has been activated due to the water temperature exceeding 100°C. Please contact your installer or local engineer.
Other issues can cause a solid red light – Please consult the Installation Manual
Check the Heating and hot water controls are turned on and calling for heat.
This could mean the boiler is running at a reduced out put, whilst safe to do so it could mean the property might not warm up as it should. Please contact your installer or local engineer.
This is a problem with the system controls. Usually one of the motorised valves has failed and will need replacing.