Carrier HH19ZA950 Limit Switch 319852-301 a new WHL0722 is required

a new WHL0722 is required to restore smooth operation and prevent motor shaft failure

Technicians typically look for furnace short-cycling

Common culprits include voltage spikes

In the HVACR industry

Designed for high-elevation compatibility and rugged residential use

Carrier HH19ZA950 Limit Switch 319852-301 a new WHL0722 is requiredThe Carrier HH19ZA950 Limit Switch is a critical OEM replacement part engineered for precise thermal management in Carrier furnaces, air handlers, and residential HVAC systems. This bi metal limit control is factory calibrated as a high limit safety, featuring a 150F open temperature and a 95F close temperature. Designed for automatic reset functionality, the HH19ZA950 effectively breaks the electrical circuit to the gas valve or heating element if