you would typically look for the C-163 model

Structural Integrity: Built to withstand commercial-grade airflow without collapsing or shedding media into the ductwork

Integrating this York sequencer into your existing air handler or furnace ensures optimized event sequencing and improved operational efficiency without the risks associated with universal aftermarket alternatives

As a genuine OEM water heater part

Williams P309600 Limit Switch you would typically look forEnsure the high limit safety of your HVAC installations with the Williams P309600 Limit Switch. This OEM spec automatic limit switch is specifically engineered for Forsaire Counterflow Top Vent furnaces, including the widely serviced 3508 and 6508 series. A critical safety component, this switch features a calibrated 150190F temperature range, designed to interrupt the burner circuit if the heat exchanger exceeds safe operating thresholds. For veteran