The Carrier HH18HA490 Rollout Limit Switch is a genuine OEM safety device designed for use in many Carrier, Bryant, and Payne high-efficiency gas furnaces. This manual-reset SPST switch is engineered to open at approximately 290°F when triggered by flame rollout or excessive heat in the burner compartment, thereby protecting the system and home from potential fire hazards.
Key Features
- Open Temperature: ~290 °F (≈ 143 °C) — designed to detect flame rollout or excessive burner-box temperatures.
- Switch Configuration: SPST (Single-Pole, Single-Throw) manual reset type — once tripped, require manual reset to resume operation.
- Brand/Quality: Factory Authorized Part™ from Carrier — exact fitting and specification to maintain system integrity, performance, and safety listings.
- Compact, lightweight: Designed for easy installation in tight furnace burner compartments (approx dimensions ~2.2 in × 1.5 in × 0.75 in, weight ~0.02 lb)
- Application Focus: Over-temperature safety / flame-roll-out protection for gas burner chambers, venting safety in high-efficiency furnaces.
