or high amp draws on the compressor circuit

Built with a laminated iron core to mitigate excessive vibration and buzzing

ensuring all port sizes and wire leads align perfectly during installation

Can the 12-inch probe be shortened for smaller ducts

Carrier HH18HA199 Limit Switch 340155-7024 or high amp draws onThe Carrier HH18HA199 Limit Switch is a critical safety component designed for high temperature monitoring in HVAC induction combustion furnaces and residential heating systems. This genuine OEM replacement part is calibrated to trigger at a fixed 200 degree opening temperature, automatically interrupting the electrical circuit via its SPST (Single Pole Single Throw) configuration to prevent heat exchanger damage or hazardous rollout conditions.