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What is the difference between the CS3AH16A24 and the CS3AN16A24
For veteran technicians and building automation contractors
Maximum Close-Off: Includes heavy-duty linkage springs designed to maintain tight shut-off even in high-pressure steam or water systems
meaning both power legs are disconnected when the coil is de-energized
Lennox 47K19 Defrost Sensor What is the difference betweenThe Lennox 47K19 Defrost Sensor is a critical OEM replacement part designed for high performance heat pump maintenance. Engineered for residential and commercial HVAC applications, this defrost tube thermostat monitors the temperature of the outdoor evaporator coil to prevent excessive ice accumulation. The 47K19 features a precise tube mount design that ensures accurate thermal feedback, initiating the defrost cycle by closing at 32 F and terminating