this Wayne tune-up kit excludes the electrode bracket holder (P/N 21679)

Utilizing a 30132030 PC board restores the operational integrity of your unit

Why are my heat strips staying on or not turning on at all

the Normally Closed function ensures the valve returns to the closed position immediately upon loss of 24V power for system safety

Viessmann 7819971 Air Vent 318423-701 this Wayne tune-up kit excludesThe Viessmann 7819971 Air Vent with Shut Off Base is a critical component for maintaining hydraulic stability in high performance condensing systems. Engineered specifically for the Vitodens series, this G3 8" automatic air vent facilitates continuous air elimination from the primary heat exchanger loop, preventing airlocks that compromise heat transfer and cause circulator cavitation. This OEM part is the direct replacement air vent for Viessmann