Description
When your furnace or HVAC system is exposed to excessive temperatures, the Carrier HH18HA148 automatic reset limit switch acts as a critical safety component — automatically cutting off operation when temperatures exceed safe thresholds (approx. 110 150°F range) and then resetting once the system returns to normal. This genuine OEM part helps ensure safe, reliable operation and protects your equipment from overheating.
Key Features
- OEM Quality Assurance: Manufactured by Carrier to original specifications—ensuring proper fit, operation and compatibility in Carrier / Bryant / Payne systems.
- Automatic Reset Function: Unlike manual reset switches, this unit restores the circuit automatically once safe temperature conditions resume — reducing service calls and downtime.
- High Limit Protection: Rated for approximately 110 150°F temperatures, protecting your system from dangerous over temperature situations.
- Compact & Durable Design: With a small footprint (approx. 2.25″ × 1.25″ × 0.95″) and low weight (about 0.02 lb / 9 g), it installs easily and withstands furnace compartment conditions.
- Cost Effective Safety Upgrade: A small investment that helps prevent major equipment damage, inefficiency, or shutdowns due to overheating.






