Campbell Hausfeld CW209000AJ Pressure Switch Unloader

Campbell Hausfeld CW209000AJ Pressure Switch with Unloader is a four-port replacement switch for Campbell Hausfeld air compressors, designed to replace worn or faulty switches. It cycles the compressor on and off in a 100 psi to 135 psi range and includes a built-in unloader valve to vent residual air when the switch opens, with the unloader tube referenced in Campbell Hausfeld service literature. As an OEM component, CW209000AJ supports standard four-port configurations that provide the unloading function and help prevent short cycling; it’s commonly installed where the unloader feature is required to speed restart. When installed, the unloader path vents air from the pump to the atmosphere, improving restart reliability and reducing tank pressure during shutdown.