Description
The York S1-02543289000 A/R Limit Switch is a control component used in furnace to monitor high-temperature conditions within the heat exchanger or air discharge path in HVAC systems. Created to open the electrical circuit when temperatures reach approximately L255F-30, shutting down burner operation to prevent overheating and protect vital furnace components from damage. These temperature drops by its reset differential, it automatically closes to restore normal operation. Mounted in gas furnaces, where it works as a regular interlock during heating cycles, startup, and fault conditions to ensure controlled operation.
