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The large LCD provides high-contrast visibility for both room and set temperatures
Are special tools required for the S1-324-40880-002 replacement
Is the TDR0645 used for high-side or low-side pressure
this encapsulated Class F coil provides superior thermal resistance
Viessmann 7834235 Ionisation Electrode 320788-702 The large LCD provides high-contrastMaintaining 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