The Hydrotherm 04-1343 Electrode is a boiler ignition and flame-sensing component designed for gas-fired HVAC systems. Installed within the burner assembly, it generates an electrical spark to ignite the fuel-air mixture and can also detect flame presence to ensure safe operation. Commonly used in Hydrotherm KN series boilers, it supports reliable startup and continuous combustion monitoring. Its durable construction with a ceramic sleeve enhances longevity, improves ignition efficiency, and helps prevent unsafe conditions, contributing to dependable performance, reduced maintenance, and overall system safety.