Furnace Flame Sensor, 1/4" Quick Disconnect, FLS52W29

Furnace Flame Sensor | FLS52W29 | 1/4" Quick Disconnect

Maintain safe and reliable furnace ignition with this brand‑new Furnace Flame Sensor (FLS52W29). Designed for dependable flame detection, this sensor ensures the burner ignites properly and prevents unburned gas from entering the system. Built with a durable base and standard 1/4" quick‑disconnect terminal for fast, secure installation.

Product Specifications:

• ✅ 1/4" quick‑disconnect terminal
• Overall Length: 4 7/8"
• Sensor Length: 2 3/4"
• Base Length: 1 1/2"
• Durable construction for long‑term furnace performance
• Condition: Brand New – Unused

Replaces Part Numbers:

52W29, LB-74940A, 31L71
Always confirm compatibility using your furnace model number before purchase.

✅ Fits Models:

Fits a wide range of furnaces using 52W29‑style flame sensors.
Please verify your model number to ensure proper fitment.

Common Fixes:

• ❌ Furnace not igniting or shutting down shortly after ignition
• ⚠️ Intermittent heating due to weak flame sensing
• Furnace cycling on and off rapidly
• ️ Error codes related to flame detection failure

️ Installation Tips:

• Turn off power and gas supply before servicing
• Locate flame sensor near the burner assembly
• Disconnect the 1/4" quick‑connect terminal and remove mounting screw
• ✅ Install new sensor securely and reconnect wiring
• Test furnace to ensure proper ignition and flame detection

⚠️ Compatibility & Installation Disclaimer:

This flame sensor is intended for use only with compatible furnace models. Buyer is responsible for verifying fitment before purchase. Installation should follow manufacturer guidelines or be performed by a qualified HVAC technician. Seller is not liable for damage, improper installation, electrical issues, gas‑related hazards, or injury resulting from incorrect use.

Reliable ignition. Safe operation. OEM‑style flame sensor replacement for residential furnaces.