Lennox 78H55 Transformer The 7-inch OEM replacement lead

The 7-inch OEM replacement lead is built with high-grade insulation to withstand the thermal stress and vibrational demands found within condenser and evaporator cabinets

this crank arm is specifically designed with a splined internal diameter to mesh with 1/2" splined actuator drive shafts for a positive mechanical lock

Its corrosion-resistant material properties make it compatible with various fluid types

Contaminant Control: Effectively removes carbon

While temporary bypassing can aid in rapid diagnostics

Lennox 78H55 Transformer The 7-inch OEM replacement leadThe Lennox 78H55 Transformer is a critical OEM replacement part designed for HVAC 24V control circuits. This step down transformer converts a 120V primary input to a stable 24V secondary output, providing the necessary low voltage power for contactor coils, ignition modules, and thermostats. With a 30VA power rating, it is engineered for consistent performance in residential and light commercial air handlers and furnaces. This unit serves as the