The Daikin-McQuay 4009510 Thermistor is a precision temperature-sensing component designed to monitor and regulate temperatures in compatible Daikin and McQuay HVAC equipment, including chillers, air handlers, and commercial air conditioning systems. It works by changing its electrical resistance in response to temperature variations, allowing the control system to make accurate opera... https://www.partshnc.com/4009510-daikin-mcquay-thermistor