Power supply frequency Installer to check main power supply is 240v/ 50 Hz
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Overheat/no circulation Installer to check for poor circulation
Fan fault Engineer visit required
Circulation fault Installer to check for poor circulation
PCB error Engineer visit required
No gas when valve opens Installer to check gas supply
Flue overheat thermostat Installer to check system circulation
Loss of flame sensing Installer to check electrodes, flue and recalibrate boiler
Loss of flame sensing Installer to check electrodes, flue and recalibrate boiler
Water circulation Installer to check system for air and no circulation