Lennox 73M00 P3 Plug/No Economizer Harness

The Lennox 73M00 P3 Plug/No Economizer Harness is a part of many Lennox HVAC applications, particularly in furnaces or air handlers The plug works within the system to eliminate the economizer. An economizer is a feature to save energy by using outdoor air for cooling when conditions permit Bypassing the economizer with this harness ensures consistent system operation regardless of the quality of the outdoor air This may be desirable in conditions where the outside air is dirty or where maintaining a cool environment is to protect equipment from overheating it could be used to ensure continuous cool air circulation regardless of the outside temperature.