Lennox 18M63 Pressure Switch 2-Stage 0.20" / 0.45" WC

The Lennox 18M63 Pressure Switch is a crucial component in all Lennox HVAC systems. It serves as a two-stage pressure switch to monitor the air pressure within the system of the vehicle. It has two set points: high set point of 0.45 Inch WC and a low set point of 0.20 Inch WC. At either of the set pressures, the switch generates an on/off SPST electrical signal to the control board of the system. This signal plays a balancing role in the operation of the system, and contributes to optimal and safe running of the system. Constructed from high quality components Pressure Switch is an authentic replacement part for Lennox HVAC systems.