18J74 | Lennox 18J7401, Pressure Switch | Lennox

Lennox 18J74 Low Ambient Pressure Switch Controls the operation of heating and cooling systems by monitoring the pressure in the system. When the pressure drops below a set point, the switch opens, turning off the system. This prevents damage to the system from low pressure conditions. The 18J74 is a reliable and accurate switch that is easy to install and maintain. It is a critical component of any heating or cooling system and can help to prevent costly repairs. Our HVAC supply store - We offer the best prices and fast shipping for your products!