Amana-Goodman 20028401 SPST Pressure Switch 1.35" WC

The Amana-Goodman 20028401 SPST Pressure Switch 1.35″ WC is an essential part of HVAC systems and is used to detect pressure in furnaces and regulate the pressure of the air being supplied. This single-pole, single-throw pressure switch is designed to close when the negative pressure is at a certain level which is normally -1.35 inches of water column. If the air pressure with the furnace falls below this level, the switch opens up a safety circuit interrupting the system for the avoidance of such dangers as formation of carbon monoxide or destruction of equipment. This makes it possible to operate the HVAC system with efficiency and safety of the part interconnects.