supporting both wall and duct mount configurations

you know that a compromised York furnace limit switch isn't just a nuisance—it’s a safety violation

always match the original temperature specifications (175°F Open / 125°F Close) provided by the manufacturer

the Trane 170f CO Auto Limit Switch offers the exact specifications required for a drop-in furnace limit switch replacement

with a maximum working pressure of 667 psig

Carrier HH12ZB230 Limit Switch supporting both wall and ductThe 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