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the probe should be removed and inspected annually for scale or sediment accumulation to ensure proper conductivity between the probe and the boiler water
maintaining strict safety protocols
Designed with a robust 1/4" NPT connection
Common Questions What is the maximum recommended length for this ignition cable
Carrier HH18HV120 Limit Switch R-22 the probe should be removedThe Carrier HH18HV120 Limit Switch is a critical safety component designed for precise thermal regulation within HVAC systems, specifically for Carrier, Bryant, and Payne furnace models. This OEM replacement part operates as an automatic reset thermal disc, calibrated to open the circuit when temperatures reach 120F and close (auto reset) when they drop to 90F. As a veteran technician knows, maintaining the integrity of the furnace high limit switch
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