Fulton Boiler 2 20 005019 Igniter Electrode 320788 702 this plug and play HVAC accessory ensures this plug and play HVAC accessory ensures that your building automation system maintains high fidelity communication This genuine OEM Lennox replacement part is engineered to monitor internal furnace temperatures and disrupt the electrical circuit if the heat exceeds the safety threshold of 155°F This high temperature electrode is engineered to withstand combustion chamber environments up to 1200°F (649°C) always cross reference your specific burner model or serial number against the Fulton 2 20 005019 part ID to ensure the correct lead length and mounting depth