Supco slf222va Rollout Limit Switch 222 Degrees

Product Description

The SUPCO slf222va is a rollout limit switch with an automatic reset function, rated to trip at 222 degrees F. Rollout limit switches are safety devices installed in gas furnaces and heating appliances to detect burner flame rollout — a hazardous condition where flames extend beyond the combustion chamber. When the sensing element reaches the trip temperature, the switch opens the control circuit, shutting down the burner to prevent heat exchanger damage or fire risk. The automatic reset function allows the switch to close again once temperatures return to a safe range. Licensed HVAC technicians typically install and service this component.

This rollout limit switch is suited for residential and light commercial gas furnace applications where burner safety monitoring is required. It installs in the burner compartment near the heat exchanger opening, where it can detect abnormal flame rollout events. The automatic reset design reduces service calls caused by manual-reset trips in situations where brief rollout conditions are investigated and resolved during the same visit.

Key Features

• Trips at 222 degrees F to interrupt the control circuit during flame rollout events
• Automatic reset function restores circuit continuity once temperatures normalize
• Safety device designed to protect heat exchangers and surrounding components from rollout damage
• Compact form factor suited for burner compartment installation in gas heating equipment

Compatibility

Designed as an OEM-style replacement rollout limit switch for residential and light commercial gas furnaces requiring a 222 degrees F automatic reset safety limit.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with applicable mechanical and gas codes. Shut off gas supply and disconnect electrical power to the furnace before removing or installing any limit switch. Mount the switch securely in the burner compartment per the original equipment location to ensure proper flame rollout detection. After installation, verify correct operation by checking that the control circuit functions normally before returning the appliance to service.

Technical Specifications

• Trip Temperature: 222 degrees F
• Reset Type: Automatic

Standard Information

• Brand: SUPCO
• Manufacturer Part Number: slf222va