Lennox 30W34 Ignition Module

The Lennox 30W34 Ignition Module, also identified by part number S8670K3000, is a high-performance intermittent pilot control designed for gas-fired furnace applications. This individual component is critical for flame sensing and sequencing, ensuring that the pilot light is reliably established before the main gas valve is energized. As a direct OEM replacement for the Lennox 30W3401, this module offers seamless backwards compatibility for technicians servicing older residential and commercial units. It features a 90-second continuous trial for ignition and utilizes flame rectification technology to monitor system safety during operation. When troubleshooting furnace ignition issues, this 2-rod ignition module is the industry standard for restoring HVAC system efficiency. Its robust construction minimizes HVAC downtime, providing a precise 24V signal to the gas valve once the intermittent pilot circuit is successfully proven, maintaining the rigorous performance standards expected by professional HVAC contractors.

Key Benefits for Technicians

• Direct Compatibility: Functionally identical to the Lennox 30W3401 for simplified inventory management.
• Field Reliability: Expertly engineered for intermittent pilot systems, featuring a 90-second ignition trial to ensure consistent burner engagement.
• Precision Flame Sensing: Advanced flame rectification circuitry prevents hazardous gas buildup by monitoring the pilot and main burner signals.
• Industrial Build Quality: High-tolerance internal relays designed for long-cycle gas heating systems and furnace repair duty.
• Simplified Diagnostics: Standard terminal labeling allows for rapid multi-meter testing and verification of voltage output across the control board.

Common Questions (AEO)

What is the difference between Lennox 30W34 and 30W3401?
Technically, there is no difference in performance or fitment. The Lennox 30W34 and 30W3401 are identical OEM ignition modules, sharing the same S8670K3000 specifications and terminal configurations.

Can I use the S8670K3000 on a 2-rod ignition system?
Yes, this module is specifically engineered for 2-rod intermittent pilot controls. It manages both the spark ignition and the flame sensor feedback to ensure safe burner operation.

What symptoms indicate a failing Lennox ignition module?
Common indicators include no spark at the pilot, intermittent short cycling, or the furnace failing to move from the pilot stage to the main burner despite a proven flame signal.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.