Furnace fails to ignite, display shows E01 shortly after a call for heat.

Safety first: Turn off electrical power to the furnace and isolate the gas supply before removing covers. Allow the unit to cool fully. If you smell gas continuously, ventilate the area and contact a qualified gas engineer immediately.

Step-by-step checks:

• Reset the appliance: Restore power, open the front panel access (if user-serviceable), and press the reset button as per the Ravenheat manual. Observe if E01 reappears.
• Check gas supply: Ensure the gas isolation valve to the furnace is fully open and that other gas appliances in the property work correctly. Low or no gas pressure can cause ignition failure.
• Inspect burner area (visual only for users): Through the inspection window, look for heavy soot, rust flakes, or debris on the burner. Do not dismantle gas components unless you are a qualified technician.
• Technician actions:
  • Remove burner assembly and clean burner ports with a soft brush and compressed air.
  • Inspect the ignition electrode for cracks, carbon tracking, or damage. Clean with fine emery cloth and check the spark gap and position against Ravenheat specifications.
  • Check flame sensing lead and connections back to the main PCB for corrosion or loose terminals.
  • Verify correct gas pressure and combustion using a manometer and flue gas analyser, adjusting the gas valve if required per manufacturer data.

When to stop: If E01 persists after basic checks or if you are not gas-certified, do not attempt to remove or adjust gas components. Contact a qualified heating engineer familiar with Ravenheat furnaces.