Trane SWT3971 SPST Pressure Switch

The Trane SWT3971 SPST Pressure Switch is an essential device for ensuring that your HVAC system later is running efficiently. It acts as a pressure monitoring and management which retains appropriate air circulation within the system. The switch has another internal contact that is opened or closed depending on the sensed air pressure. A switch operates the electrical aspects including the compressor or fan when pressure is up to a predetermined level. This helps the system to achieve the right pressure to warm or cool as required. This type of switch is an SPST and is usually installed in two-stage air conditioning systems.