Lennox 38M64 Pressure Switch 1.95" WC

The Lennox 38M64 is a pressure switch, which is a control element that is applied on different HVAC products of Lennox, such as furnaces and air handlers. It is used to monitor the air pressure within the safety of the system. It turns on/off signals depending on the pressure levels which are normally set at 1.95 Inches of water column (WC) in this case. This tends to sustain a reasonable flow of air that is essential in the running of the equipment as well as in avoiding damage of them. For example, if the pressure drops below the set point by the filter getting blocked then the switch is capable of telling the furnace to stop overheating.