Optimized Modulation: Manages the 5:1 turndown ratio effectively to maintain efficiency and reduce short-cycling

This part is fully cross-compatible and identical to the Lennox 43H8101

or a stuck valve plunger causing the coil to overheat while energized

Optimized HVAC Efficiency: Creates a tight seal that prevents ductwork air leakage

Industrial Durability: Engineered for long-term service in demanding environments

Viessmann 7834235 Ionisation Electrode 320734-701 Optimized Modulation: Manages the 5:1Maintaining precise flame rectification is critical for the operational safety of high efficiency condensing boilers. This genuine Viessmann 7834235 Ionisation Electrode is engineered specifically for the Vitodens 200 W WB2B series, ensuring the control board receives a stable microamp signal to confirm combustion. A faulty or oxidized electrode can lead to intermittent "F4" fault codes or hard lockouts, necessitating an immediate swap to restore