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making it a versatile differential pressure switch for proving fan operation or monitoring filter status in demanding mechanical environments
including air conditioners
While it performs switching duties similar to a sequencer
always verify your specific heater’s parts list to confirm the 97300 part number
Daikin-McQuay 4009542 Circuit Board 323269-701 making it a versatile differentialFor service professionals managing a "U4" or "E30" error code on high performance split systems, the Daikin McQuay 4009542 Circuit Board is the precise field ready solution. This genuine OEM replacement board (sometimes listed as PCB CTXS07LVJU) is the primary command module for indoor units, coordinating the electronic expansion valve (EEV) and fan motor communication pulses for stable refrigerant flow. As an official Daikin HVAC part, it ensures
