Lennox 43K53 Flame sensor High-Visibility Design: The red push-button

High-Visibility Design: The red push-button interface allows for rapid identification during emergency service or lighting procedures

while the secondary side provides standard 18 AWG wiring for easy integration into existing terminal blocks

the 42-21571-08 is rated for both 50Hz and 60Hz

Technicians should check for a dirty air filter

3 mL/s) at 20 psig

Lennox 43K53 Flame sensor High-Visibility Design: The red push-buttonThe Lennox 43K53 Flame Sensor is a critical OEM safety component engineered for precise flame rectification in gas fired heating systems. This double prong flame sensor, also identified by part number 43K5301, monitors the combustion process to ensure a stable pilot or burner flame is present before allowing the gas valve to remain open. Built with high temperature resistant materials and a 4 inch overall length, this Lennox furnace flame sensor is a