This switch is an F145-30F model

Broad Compatibility: Engineered specifically for Armstrong F&T Series A and B bodies

the "U" suffix typically denotes a universal or retail-packaged version of the same industrial component

High Pressure Rating: Rated for 400 psi static pressure

Key Benefits for Technicians: Direct OEM Compatibility: Serves as a precise replacement for the 5300-032 and various E-series thermostats across multiple equipment brands

Carrier 52CQ500434 Grille R-410A This switch is an F145-30FThe Carrier 52CQ500434 Air Discharge Grille is a critical OEM replacement component designed specifically for Carrier PTAC 52C Series units and compatible Packaged Terminal Air Conditioner systems. This HVAC air louver ensures optimal airflow distribution and static pressure management, which is essential for maintaining system efficiency and compressor longevity. Engineered for a precise fit, the 52CQ500434 discharge grille eliminates bypass air