Pay in 4 interest-free payments of $24.16 Learn more
Ships within 48 hours · Estimated delivery Sep 16 - Sep 21
Engineered for direct service substitution
This construction effectively contains the smaller molecules of newer refrigerants
removing the need for manual adjustment in energized cabinets
The indicator is accurately calibrated to change at moisture levels generally accepted as the safe operating range for the compressor
Lennox 37K63 Thermistor Kit 30067439-890 Engineered for direct service substitutionThe Lennox 37K63 Thermistor Kit is a critical OEM replacement sensor designed for high accuracy temperature monitoring in residential and commercial HVAC systems. This HVAC temperature sensor is functionally identical to the Lennox 37K6301, providing the exact electrical resistance profiles required for the system control board to modulate heating and cooling cycles effectively. It features a standard 10k resistance at 77F and is engineered to operate