Carrier HH12ZB230 Limit Switch the internal bi-metal disc has

the internal bi-metal disc has likely sustained mechanical failure and requires replacement

What manifold pressure should I set after installing this spring

Common Questions How do I know if my furnace door switch is faulty

the Siemens Building Technology 184-113 Tee Restrictor is the critical component for maintaining precise branch pressure in one-pipe pneumatic circuits

You should reuse your existing adjustment screw and gasket or source them separately if they are damaged

Carrier HH12ZB230 Limit Switch the internal bi-metal disc hasThe Carrier HH12ZB230 Limit Switch is a critical safety component designed for precise thermal monitoring in high output furnace and air handler applications. As an OEM Carrier furnace limit switch, this device features an automatic reset mechanism and is calibrated for an opening temperature range of 190F to 230F. This part is engineered to interrupt the burner or heating element circuit if the internal plenum temperature exceeds safe operating