The Trane CNT1170 Defrost Control is a critical OEM replacement part designed for precision management of the defrost cycle in high-efficiency heat pump systems

it serves as a direct replacement for ZR57K3E-PFV-930 and ZR57K3E-PFV-830 models

Optimized Flow: Engineered to maintain specifications for flow rates

The "R" designates its auto reset functionality

as the device is entirely induced from the monitored conductor

Carrier HT01BF232 Transformer 319847-401 The Trane CNT1170 Defrost ControlThe Carrier HT01BF232 Transformer is a heavy duty 60VA HVAC control transformer designed for reliable voltage step down in commercial and residential Carrier, Bryant, and Payne air handlers and packaged units. Engineered for precise 200 230V primary to 24V secondary conversion, this Class 2 transformer provides the stable power required for contactors, control boards, and thermostats. Featuring a multi tap primary connection and a robust foot mount