Designed as a direct replacement for models such as the AC036X1021A

If the meter indicates infinite resistance (open) while the unit is cool

What are the symptoms of a failing 1171306 combo

Whether you are navigating tight mechanical rooms or installing large-scale VRF systems

Carrier HH12ZB240 Limit Switch Designed as a direct replacementThe Carrier HH12ZB240 is a high limit OEM replacement part engineered for precise thermal regulation and safety in Carrier, Bryant, and Payne gas furnaces. As a normally closed (NC) switch, it is designed to protect the heat exchanger from damage caused by restricted airflow or blower failure. This auto limit switch functions on a specific thermal cycle, opening the circuit when internal temperatures reach 240F to interrupt the gas valve and closing