Carrier HH12ZB200 Limit Switch This locking thermostat cover utilizes

This locking thermostat cover utilizes a heavy-duty eight-tumbler lock and includes an HVAC guard key for secure access

mechanical joints in refrigerant lines

Direct OEM Compatibility: Engineered as a drop-in replacement for the S1-024-26099-000

Apply the recommended lubricant to the polymer seal to prevent binding or pinching during section pull-up

Carrier HH12ZB200 Limit Switch This locking thermostat cover utilizesThe Carrier HH12ZB200 Limit Switch is a critical OEM replacement part engineered for precise thermal protection in residential and light commercial furnaces. This auto reset limit switch features a 3 inch insertion depth and is factory calibrated for an L200 40 configuration, meaning it opens on a temperature rise at 200F and automatically closes once the system cools to 160F. As a furnace high limit thermostat, it prevents internal heat exchanger