Viessmann Vitodens 100 WB1C PCB – Refurbished | Part No. 7838301 / 7841748

When a Viessmann Vitodens 100 WB1C boiler displays fault codes, fails to ignite, loses heating or hot water control, or shuts down unexpectedly, the PCB is often the primary cause. The Viessmann Vitodens 100 WB1C PCB (Part Nos. 7838301 / 7841748) is a refurbished replacement that restores full electronic control of your boiler — managing ignition, fan operation, sensor monitoring, and all safety functions.

Each refurbished PCB is taken from a functioning Viessmann WB1C boiler and thoroughly tested before dispatch, confirming it meets original performance and safety standards. Available via Advance Replacement Service, Direct Sale, or Repair/Exchange.

Important: This item is currently out of stock. Please contact us to register your interest or check back soon.

Compatible Boiler Models

Key Features

• Viessmann part numbers 7838301 and 7841748 — direct OEM replacement for WB1C series
• Fully refurbished and tested against original Viessmann performance standards
• Covers all Vitodens 100 WB1C 19–35kW Combi and System variants (2012–2016)
• Manages ignition, fan, sensors, heating and DHW demand, and all safety interlocks
• Choice of Advance Replacement, Direct Sale, or Repair/Exchange service
• 12-month warranty included

Delivery & Returns

Orders placed before 1:00 PM (Monday–Friday) are dispatched the same working day. Standard and next-day delivery available at checkout. Next-day Friday orders arrive Monday — select Saturday delivery at checkout if needed. Returns accepted within 30 days if unused and in original packaging.

Note: PCB installation must be carried out by a Gas Safe registered engineer.