the switch is designed to sense positive

Whether you are dealing with a failed startup or inconsistent static pressure

Key Benefits for Contractors: OEM Compatibility: Precision-matched for Lennox

including various cast iron and diskus models

Q: What are signs of a failing outdoor power board

Viessmann 7870851 Ignition Electrode 318518-761 the switch is designed toThe Viessmann 7870851 Ignition Electrode is a critical OEM replacement part engineered for precise combustion initiation in high efficiency Viessmann Vitodens boilers. As a primary component in the burner assembly, this electrode generates the high voltage spark required to ignite the gas air mixture, ensuring a stable flame signal and preventing ignition lockouts. Designed for the Vitodens 200 W and 222 F series, specifically for units ranging from