Lennox 78H55 Transformer or secondary heat exchanger leaks

or secondary heat exchanger leaks in high-efficiency furnaces that allow condensate to drip onto the burner assembly

Designed for reliable pressure monitoring and system safety

it provides the mechanical flexibility required to translate actuator torque into reliable blade positioning

Keep these on the truck to protect your customers' commercial cold beverage equipment from the environmental contaminants that lead to avoidable system downtime

Is the S1-025-29041-012 compatible with older S1-2702-3181/A units

Lennox 78H55 Transformer or secondary heat exchanger leaksThe 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