Carrier 00PPG000472900 Flow Switch R-454B The Trane FAN3657 Fan Blade

The Trane FAN3657 Fan Blade is a heavy-duty OEM replacement fan blade designed for precision airflow management in Trane and American Standard condenser units

The 01APS-501 has a burst pressure rating of 40 inches WC (10 kPa)

providing enhanced durability and resistance to scaling compared to standard brass internals

How does this model differ from the STI-9620

Installing a higher-limit switch can lead to cracked heat exchangers and creates a significant safety hazard by allowing the furnace to run at unsafe temperatures

Carrier 00PPG000472900 Flow Switch R-454B The Trane FAN3657 Fan BladeThe Carrier 00PPG000472900 flow switch is an HVACR safety and control device designed to verify proper fluid movement within chilled water and hydronic systems. This Carrier flow switch is commonly used in commercial HVAC equipment to protect chillers, pumps, and refrigeration circuits by confirming adequate water flow before system operation is allowed. It helps prevent equipment damage caused by low flow or no flow conditions and ensures stable