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This board is engineered to interface directly with the user interface control and monitored safety switches
Technicians typically observe the inducer motor running but the ignition sequence failing to engage
it is intended for use in systems where pressure regulation is handled by an external manifold regulator or as part of a specific OEM configuration
allowing technicians to fine-tune the range between the cut-in and cut-out points to meet specific system requirements
which is essential for maintaining the SEER ratings of the original equipment
Daikin-McQuay 4009585 Thermistor 320735-701 This board is engineered toWhen you're troubleshooting a Daikin FTXB09 or FTXB12 mini split unit and encountering sensor errors or inconsistent compressor modulation, the Daikin McQuay 4009585 Thermistor is the genuine OEM replacement required to restore factory spec communication between the ambient air or coil temperature and the control board. For any tech in the field, using an OEM HVAC thermistor like the 4009585 is critical because it ensures the resistance to temperature
