Nordyne 632657 Pressure Switch

The Nordyne632657 Pressure Switch serves as a replacement part for HVAC systems that functions with airflow control. When it senses any change in pressure, such as during blower fan start-up or stop, it puts itself into operation mode or goes back to inactive depending on the situation. If this switch were not there, the system would probably run forever without stopping because there is high possibility that either of motors could get damaged due to continue running while still energized especially if they don’t have protection, simply turning them off can cause failure afterwards due to increased overload conditions ensuing from current limitations.