Carrier HH18HA490 Rollout Switch is an OEM safety limit control designed to protect gas-fired HVAC equipment from unsafe flame rollout conditions. This manual-reset rollout switch opens the control circuit when excessive temperatures are detected, shutting down burner operation to help prevent damage to the unit and surrounding components.

Rated to open at approximately 290°F, the HH18HA490 is commonly used in residential and light commercial gas furnaces where flame rollout protection is required. The switch features a compact, durable design and single-pole, single-throw operation, allowing for reliable performance in demanding HVAC environments.

This rollout switch is manufactured to Carrier OEM specifications and is intended as a direct replacement for compatible Carrier furnace applications. Installation and reset should be performed by a qualified HVAC technician after the underlying cause of the rollout condition has been identified and corrected.
 

Key Features & Benefits

• OEM Carrier rollout safety switch

• Protects against flame rollout and overheating

• Manual reset design for controlled restart

• Opens at approximately 290°F

• Single-pole, single-throw configuration

• Designed for use in gas furnace applications