Plenum Protection: Prevents heat exchanger stress by managing airflow based on real-time internal temperatures

making it an ideal compressor heater replacement for technicians troubleshooting tripped breakers or slugging issues in residential and light commercial refrigeration systems

using a genuine Lennox P-8-1419 replacement is non-negotiable for system calibration

such as the GCIB045CA30 series

York S1-025-37344-000 Limit Switch Plenum Protection: Prevents heat exchangerThe York S1 025 37344 000 Limit Switch is a critical safety component engineered for precise thermal regulation within York, Luxaire, and Coleman gas furnaces. This OEM replacement part operates as a normally closed switch that opens the electrical circuit when the internal plenum temperature reaches its 215 degree Fahrenheit trip point. Designed with a 30 degree differential, the automatic reset furnace limit re closes at 185 degrees Fahrenheit,