Designed for natural gas and propane applications

ensuring all port sizes and wire leads align perfectly during installation

Invest in this authentic industrial HVAC controller to restore factory-standard performance and optimize total system efficiency

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

Is the 171702 compatible with manual reset requirements

Carrier HH18HA199 Limit Switch 340155-7024 Designed for natural gas andThe 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.