Description
The Carrier HH18HA202 is an OEM rollout switch engineered to protect furnaces and heating systems from dangerous flame rollout conditions. When burner flames roll out beyond their intended combustion area — often caused by heat exchanger failures, blocked flue passages, or restricted airflow — this switch trips at 350°F to immediately interrupt the heating circuit and prevent equipment damage or fire hazards.
Key Features
- 350°F (177°C) trip temperature for precise, reliable flame rollout detection
- SPST (Single-Pole, Single-Throw) circuit configuration
- Manual reset design requires technician intervention before the system restarts, ensuring the root cause is identified and corrected
- Direct OEM replacement for compatible Carrier furnace models
- Rugged construction built to withstand the harsh thermal environment of a furnace burner compartment
Why Manual Reset Matters
Unlike automatic-reset limit switches, a manual reset rollout switch prevents the furnace from cycling back on after a fault without a qualified technician inspecting the system. This added layer of safety helps protect homeowners and equipment from recurring flame rollout events that could lead to carbon monoxide exposure or fire.
Application
- Carrier residential gas furnaces requiring OEM rollout switch replacement
- Suitable for use during routine maintenance, safety inspections, or post-fault repairs
Specifications
- Brand: Carrier
- Part Number: HH18HA202
- Switch Type: Rollout / Flame Rollout Limit Switch
- Trip Temperature: 350°F
- Circuit Type: SPST (Single-Pole, Single-Throw)
- Reset Type: Manual Reset
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