Description
The Carrier HH22HA194 is a manual reset rollout switch engineered to protect gas furnaces from dangerous flame rollout conditions. When burner flames escape the combustion chamber and roll out beyond safe boundaries, this switch detects the elevated temperature and immediately interrupts the circuit — shutting down the burner to prevent heat exchanger damage, component failure, or fire hazard.
How It Works
The switch opens at 190°F, cutting power to the gas valve or ignition circuit when unsafe rollout temperatures are detected. Once the root cause has been identified and corrected, the switch can be manually reset to restore normal furnace operation. The manual reset design is an intentional safety feature — it prevents the furnace from automatically restarting until a qualified technician has inspected and cleared the fault condition.
Key Specifications
- Open Temperature: 190°F
- Close Temperature: 150°F
- Reset Type: Manual Reset
- Capillary Length: 55 inches
- Compatible Brand: Carrier
- Part Number: HH22HA194
Features & Benefits
- Manual reset ensures a technician must inspect the system before resuming operation — preventing repeated unsafe cycling
- 55″ capillary provides flexible placement and routing within the furnace cabinet for precise sensing at the burner area
- Precise open/close temperature differential (190°F/150°F) delivers reliable, repeatable protection without nuisance trips
- Direct OEM replacement for Carrier furnaces — ensures proper fit, function, and compatibility
- Helps protect heat exchangers, burner assemblies, and surrounding components from flame rollout damage
Application
The HH22HA194 is a direct OEM replacement rollout switch for compatible Carrier gas furnaces. It is typically mounted near the burner assembly and connected in series with the furnace control circuit. Always refer to the furnace service manual and wiring diagram when installing or replacing rollout switches.
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