Lennox 15D55 Control Board 326058-756 using a new X13455-1 gasket

using a new X13455-1 gasket kit is recommended for a leak-free seal

Engineered with a 10-second Trial for Ignition (TFI) and an integrated 120V gas valve relay

which is critical for preventing condensation and tarring

including digital thermostats

It is a direct drop-in replacement designed to meet the exact setpoint stability required for stable operation under heavy load cycles

Lennox 15D55 Control Board 326058-756 using a new X13455-1 gasketThe Lennox 15D55 Defrost Control Board is a critical OEM replacement component engineered to manage the complex defrost cycles of Lennox heat pump systems. As a veteran technician knows, maintaining the integrity of the outdoor coil is paramount; this board utilizes advanced demand defrost logic to monitor coil and ambient sensors, preventing efficiency robbing frost buildup. With high temp ratings up to 105C and a robust 47F capacitance, the Lennox