For technicians servicing legacy R-22 commercial equipment

If the furnace blower runs continuously but there is no heat

Engineered for specialized HVAC furnace maintenance

it is calibrated specifically for natural gas applications

this OEM part provides the reliability required for combustion air control and safety sequence verification

Carrier HH18HB016 Thermostat 324846-701 For technicians servicing legacy R-22The Carrier HH18HB016 Freeze Thermostat is a critical OEM HVAC safety control designed to prevent catastrophic equipment failure caused by low temperature conditions. As a factory authorized part, this freeze protection switch monitors the evaporator coil or water lines, automatically breaking the circuit to the compressor or activating the heating cycle when temperatures drop below the calibrated set point. Engineered for Carrier, Bryant, and Payne