Why does my furnace keep tripping this switch

As an auto-reset furnace limit switch

000 psi vacuum and pressure

with a maximum working pressure of 667 psig

supporting both wall and duct mount configurations

Carrier HH12ZB230 Limit Switch Why does my furnace keepThe 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