Furnace Igniter & Flame Rod for Q3400A1024, Q3400A1040, AFN643

Furnace Igniter & Flame Rod Assembly – Replaces Honeywell Smart Valve Series (AFN643)

Restore safe and reliable ignition in your gas furnace with this brand-new igniter and flame rod assembly. Designed to replace Honeywell SmartValve series components, the AFN643 is a direct-fit solution for pilot ignition and flame sensing in systems using SV9500 and SV9600 Smart Valves.

⚙️ Product Features:

• Voltage: 24V AC
• Includes: Igniter-flame rod assembly, 30″ wiring harness with keyed plug, mounting clip
• Function: Igniter lights pilot burner; flame rod verifies pilot flame
• Connector: Keyed plug fits SV9500/SV9600 SmartValve systems only
• Condition: Brand New – Unused

Replaces These Part Numbers:

• AFN643
• 1009524
• 1149856
• 42640001
• Q3400A
• Q3400A1016
• Q3400A1024
• Q3400A1040
• Q3450
• Q3480
• Q3620

✅ Compatible With:

• Honeywell SmartValve systems: SV9500, SV9600
• Used in pilot hardware Q3400A, Q3450, Q3480
• Common in Goodman, Amana, and other OEM gas furnaces

️ Installation Tips:

• Disconnect power and shut off gas supply before servicing
• Remove access panel and locate pilot burner assembly
• Detach old igniter/flame rod and unplug harness
• Install new assembly using included clip and plug in harness
• ✅ Confirm proper flame sensing and ignition sequence before reassembly

⚠️ Installation Disclaimer:

This igniter-flame rod assembly is designed for Honeywell SmartValve systems only. Buyer is responsible for verifying compatibility with their specific furnace model prior to purchase. Installation should be performed by a licensed HVAC technician. Returns not accepted on installed or damaged items due to the fragile nature of igniters.

Reliable ignition. Verified flame. Built for Honeywell SmartValve systems.