Trane SEN1001 Thermister 30067439-890 the CNT3520 serves as a

the CNT3520 serves as a safety limit to ensure the inducer motor is moving sufficient combustion air before the ignition sequence begins

The 28-inch lead wire provides necessary slack for proper cable management

calibrated to verify that the induced draft motor is generating the correct static pressure within the heat exchanger before ignition

These valves are typically rated for water temperatures up to 281°F (138°C)

Frequent signs include the outdoor unit failing to enter defrost

Trane SEN1001 Thermister 30067439-890 the CNT3520 serves as aThe Trane SEN1001 is a high precision, watertight thermistor engineered for rigorous temperature monitoring in residential and light commercial HVACR systems. As a veteran grade OEM replacement part, this 10k ohm NTC sensor is critical for maintaining accurate closed loop control in environments prone to moisture. With an operating range of 45F to 65F, it is specifically optimized for low ambient applications, including outdoor air sensing, liquid