Tested Reliability: Every unit is factory-tested to ensure the 24V motor draws consistent current under load

Built for continuous duty in demanding environments

Reliable Operation: The pilot-operated floating diaphragm design allows for consistent opening and closing even at high pressures

we recommend verifying your existing seal's condition and using high-temp silicone if a replacement is not present

This specific part is designed for Monterey Top Vent counterflow models

Carrier HH12ZA218 Limit Switch 320735-701 Tested Reliability: Every unit isThe Carrier HH12ZA218 Limit Switch is a critical safety component designed for high efficiency residential heating systems, specifically engineered for furnace limit switch replacement in Carrier, Bryant, and Payne units. This OEM replacement part functions as a normally closed switch that breaks the electrical circuit when the internal plenum temperature exceeds the 180 220F safety threshold. As an auto reset limit switch, it automatically re engages