📄 Description

Genuine Viessmann part number 7828749 – a domestic hot water flow sensor designed for use in Viessmann Vitodens 100-W WB1B combi boilers.

This sensor detects water flow demand when a hot tap is opened and signals the boiler to ignite and produce domestic hot water. It is a vital component for correct hot water operation and efficient boiler performance.

The 7828749 flow sensor is commonly replaced when diagnosing faults such as intermittent hot water, no hot water demand detection, or flow-related boiler errors.

⚙️ Key Features

✅ Genuine Viessmann OEM Part – 7828749
✅ DHW Flow Sensor / Flow Switch 💧
✅ Detects domestic hot water demand
✅ Signals boiler to ignite for hot water 🔥
✅ Essential for combi boiler operation
✅ Direct replacement OEM fitment
✅ Common fix for hot water flow faults ⚠️
✅ Designed specifically for Vitodens combi range

📋 Compatibility (MODELS)

✔️ Fits Viessmann Vitodens 100-W combi boilers requiring 7828749

🔍 Commonly used in models such as:

• Vitodens 100-W WB1B 26kW Combi 🔥
• Vitodens 100-W WB1B 30kW Combi 🔥
• Vitodens 100-W WB1B 35kW Combi 🔥
• Vitodens 100 WB1C 26 / 30 / 35kW
• Vitodens 100-W B1KC range
• Vitodens 100-W BPJA 25kW / 29kW

✔️ Suitable for:

• Combi boilers 🔥💧
• Domestic central heating systems 🏠
• DHW flow detection systems

✔️ Used for:

• Domestic hot water activation
• Flow monitoring
• Repair of hot water demand faults ⚠️

📌 Fitment Notes:

• Must match 7828749 exactly
• Also referred to as Flow Sensor CPK
• Installed internally within the boiler hydraulic assembly
• Professional installation recommended

💬 Send your exact Viessmann serial/model and I’ll confirm compatibility instantly 👍

📦 What’s Included

✔️ 1 × Viessmann 7828749 Flow Sensor

📷 Supplied as per part number reference.