Viessmann Vitodens 100-W WB1B PCB 7841525 / 7841748 – Refurbished | 13–35kW

A failed control board in a Viessmann Vitodens 100-W WB1B boiler leads to loss of ignition, heating failure, and costly downtime. The Viessmann PCB 7841525 / 7841748 is a refurbished replacement control board that restores all essential electronic functions including ignition control, heating management, and system safety monitoring — helping you avoid expensive boiler replacement.

Compatible with Vitodens 100-W WB1B Heat Only (13–35kW) and WB1C Combi 30kW models. Each unit undergoes strict testing before dispatch. Condition: Refurbished. Supplied with a 12-month warranty.

Key Features

• Part Numbers: 7841525 / 7841748 (formerly 7831178)
• SKU: PCB-1221-A-BC
• Fits Vitodens 100-W WB1B Heat Only (13, 16, 19, 26, 35kW)
• Also fits Vitodens 100-W WB1C Combi 30kW
• Professionally refurbished and tested
• Condition: Refurbished | Warranty: 12 Months

Compatible Boiler Models

Vitodens 100-W WB1B Heat Only: 13kW (GC 41-819-21), 16kW (GC 41-819-22), 19kW (GC 41-819-23), 26kW (GC 41-819-24), 35kW (GC 41-819-25)

Vitodens 100-W WB1C Combi: 30kW (Serial No. 7441745)

Important Notes

Select your boiler type (Heat Only/Combi) when ordering. Verify part number matches 7841525 or 7841748 before purchase. Must be installed by a Gas Safe registered engineer. All prices inclusive of VAT.