Lennox 16V38 Defrost Control Board

The Lennox 16V38 Defrost Control Board serves as an essential part of HVAC systems it provides regulatory functions for heating pumps and air conditioning units. The control board operates through time and temperature-based controls to minimize ice formation on outdoor coils. This control board integrates defrost relays with anti-short cycle timed-off controls and high and low-pressure switch system controls to improve HVAC system efficiency. The board works by obtaining data from sensors which helps it decide when to run defrost cycles. The system enables compressor shutdown for 30 seconds during defrost cycle initiation and termination protecting equipment from short cycling damage.