Amana-Goodman 20197312 Light Blue Pressure Switch 0.37" WC

The Amana-Goodman 20197312 Light Blue Pressure Switch is an essential part of residential and light commercial HVAC systems especially those with gas furnaces. This pressure switch is intended to measure the static pressure in the furnace combustion chamber. If the pressure in the chamber is outside the range of the normal operating pressure, the pressure switch will either break or complete an electrical circuit sending a signal to the furnace control board. From this signal, several safety features may activate, including the termination of the supply of the reported gas or the display of an error number, to avert risks of explosions or lethal doses of carbon monoxide.