Trane FLS013 Hsi Flame Sensor Straight

Product Description

The TRANE FLS013 is a straight hot surface ignition (HSI) flame sensor designed for use in gas furnace systems. The flame sensor monitors the presence of a burner flame by passing a small electrical current through the flame, confirming ignition and allowing the control board to keep the gas valve open. Without a functioning flame sensor, the furnace control will shut off the gas valve within seconds of ignition as a safety measure. This component is a direct OEM-style replacement suited for Carrier applications and is typically installed by licensed HVAC technicians during routine maintenance or troubleshooting of ignition-related faults.

This flame sensor is intended for residential and light commercial gas furnace applications. It is configured in a straight mounting orientation, which matches specific burner box geometries found in Carrier furnace platforms. HVAC service technicians commonly replace flame sensors when a furnace exhibits short-cycling, nuisance lockouts, or when the sensor rod shows visible oxidation or carbon buildup that cannot be resolved by cleaning. The straight body style simplifies installation in tight burner compartments where angled sensors would not seat correctly.

Key Features

• Straight sensor body orientation for compatible Carrier furnace burner box configurations
• Hot surface ignition (HSI) type flame sensing for reliable flame current detection
• OEM-style replacement designed to restore proper furnace safety lockout function
• Monitors flame presence to prevent unburned gas accumulation during ignition faults
• Suitable for residential and light commercial gas furnace service

Compatibility

Designed as an OEM-style replacement flame sensor for Carrier gas furnace applications requiring a straight HSI flame sensor configuration.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with local mechanical codes and the furnace manufacturer service documentation. Always shut off electrical power at the disconnect switch and turn off the gas supply before removing or installing a flame sensor. The sensor rod must not be touched with bare hands, as skin oils can degrade flame current performance. Reconnect all wiring and verify furnace operation through a complete ignition cycle before returning the system to service.

Technical Specifications

• Sensor Type: Hot Surface Ignition (HSI) Flame Sensor
• Body Orientation: Straight

Standard Information

• Brand: TRANE
• Manufacturer Part Number: FLS013