Greenheck 386418 Pressure Switch R-448A or moisture buildup in the

or moisture buildup in the pressure tubing

preventing head pressure spikes that can lead to compressor failure

For liquid immersion or remote bulb applications

shielded cable should be utilized to maintain signal integrity

If the air handler is blowing cold air during a call for heat (W1/W2)

Greenheck 386418 Pressure Switch R-448A or moisture buildup in theThe Greenheck 386418 Pressure Switch is a critical safety and monitoring component designed for precise differential pressure sensing in commercial HVAC systems. This dual air pressure switch operates by monitoring the pressure drop across filters, coils, or fan inlets to ensure proper airflow and system integrity. Engineered for high cycle reliability, the 386418 features a single pole double throw (SPDT) contact configuration, allowing for seamless