Carrier HH12ZB220 Limit Switch maintaining furnace blower timing and

maintaining furnace blower timing and preventing structural damage during airflow restrictions

Precision Machined SAE Threads: 5/16 male flare and 1/4 MPT connections specifically sized for compatibility with modern mini-split and refrigeration systems

Thermal Stability: Manufactured with industrial materials designed to resist degradation under constant high-temperature exposure

the 632183R provides the millivolt stability needed to prevent nuisance shutdowns in Nordyne furnace units and Miller mobile home applications

you must use the RK 800M4-V 1 (part number 0887710) to ensure proper sealing diameters

Carrier HH12ZB220 Limit Switch maintaining furnace blower timing andThe Carrier HH12ZB220 Limit Switch is a critical safety component designed for high limit protection in residential furnaces, packaged units, and air handlers. Engineered as a normally closed (NC) switch, this part initiates a system cutout when the 220F open temperature is reached, effectively preventing heat exchanger damage and hazardous operating conditions. Once the plenum cools to the 180F close temperature, the bimetal disc automatically