Note. In normal operation the boiler status display (D) will display messages (see section 7). Note . Boiler frost protection - boiler will fire if temperature is below 5ºC. During normal operation the burner on symbol (E) will remain illuminated when the burner is lit. Note. If the boiler fails to light after five attempts the following fault messages will be displayed: To restart the boiler, press restart. The boiler will repeat the ignition sequence. If the boiler still fails to light consult a Registered Gas Installer, or in IE a Registered Gas Installer (RGII).