Carrier HH18HA599 L280F Manual Reset Rollout Switch

Description

Carrier HH18HA599 L280F Manual Reset Rollout Switch

The Carrier HH18HA599 is an L280F Manual Reset (MR) Rollout Switch designed to protect your furnace from the dangers of flame rollout. When abnormal combustion causes flames to extend beyond the burner area, this safety switch detects the elevated temperature and immediately interrupts the burner circuit — shutting down the system before damage or hazard can occur.

Key Features

• OEM Carrier replacement rollout switch for precise fit and reliable performance
• L280F temperature rating — trips at 280°F to protect against flame rollout conditions
• Manual reset design requires a technician to physically reset the switch, ensuring the root cause is identified and corrected before resuming operation
• Interrupts the burner circuit upon activation, preventing equipment damage and potential fire hazard
• Direct OEM replacement ensures compatibility with applicable Carrier furnace models
• Compact, durable construction built to withstand the demanding environment of a furnace heat exchanger area

Why Manual Reset Matters

Unlike automatic-reset switches, a manual reset rollout switch requires deliberate technician intervention after a trip event. This built-in safety feature prevents the furnace from automatically restarting after a potentially dangerous rollout condition, prompting a proper inspection of the heat exchanger, burners, and venting system before the unit is returned to service.

Application

• Designed for use in Carrier gas furnaces requiring an L280F MR rollout switch
• Ideal for HVAC technicians performing OEM-spec repairs and maintenance
• Always verify compatibility with your specific furnace model number before installation