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Long-Term Reliability: Tested for over one million cycles with a replaceable ring packing design to extend the service life of the valve body
Is the Danfoss 121L3277 a replacement for the 120U3277
This occurs when the sensor detects combustible vapors or if the sensor’s internal resistance is out of spec (often exceeding 48
Key Benefits for Technicians Precision Fit: Designed strictly for Weil-McLain GV90+ boilers
Its robust insulation is built to withstand the rigorous heat profiles of commercial HVACR environments
Lochinvar & A.O. Smith 100275527 Flue Sensor 321042-401 Long-Term Reliability: Tested for overThe Lochinvar & A. O. Smith 100275527 Flue Sensor with integrated grommet is a critical safety and monitoring component used across high efficiency condensing boilers and commercial water heaters. This negative temperature coefficient (NTC) thermistor provides real time flue gas temperature monitoring to the control board, ensuring the appliance operates within specified thermal limits and prevents heat exchanger damage. Designed as a direct
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