Viessmann Flow Sensor, Boiler Water Flow Switch, Flow Meter Replacement Spare Part, Heating System Sensor Part Number: 7828749

Viessmann Flow Sensor, Boiler Water Flow Switch, Flow Meter Replacement Spare Part, Heating System Sensor

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£123.77
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Viessmann Flow Sensor, Boiler Water Flow Switch, Flow Meter Replacement Spare Part, Heating System Sensor Part Number: 7828749
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Viessmann Flow Sensor, Boiler Water Flow Switch, Flow Meter Replacement Spare Part, Heating System Sensor

SKU W-415049
Manufacturer part number
7828749
£123.77
inc VAT£103.14 ex VAT
Lead time: 1-5 working days

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Product: Viessmann Flow Sensor, Boiler Water Flow Switch, Flow Meter Replacement Spare Part, Heating System Sensor (Part no. W-415049)

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Description

Product Overview

The Viessmann 7828749 flow sensor is a replacement boiler spare designed to monitor water flow within a compatible Viessmann heating system. It helps the boiler detect correct circulation, supporting safe operation and efficient performance. Ideal when replacing a faulty or intermittent flow sensor to restore reliable heating and hot water control.

Key Features

  • Accurate water flow detection – supports stable boiler operation and helps prevent lockouts caused by poor flow signals.
  • Replacement spare part – ideal for like-for-like swap during maintenance to get heating and hot water back up and running.
  • Designed for Viessmann systems – suitable for compatible boilers where MPN 7828749 is specified, improving fit confidence.
  • Supports efficient performance – helps the appliance regulate demand correctly, contributing to smoother operation and reduced nuisance faults.

Use Case / Application

Used within domestic and light commercial boiler and heating installations where a flow sensor is required to monitor water circulation. Common applications include:

  • Boiler servicing and repairs in a kitchen or utility room installation
  • Diagnosing intermittent hot water or heating issues linked to flow detection
  • Planned maintenance for landlords, homeowners and heating engineers
  • Replacing a worn or faulty boiler water flow switch or flow meter sensor during a breakdown call-out

Problem → Solution

Perfect for resolving boiler faults caused by incorrect or inconsistent water flow readings, helping restore dependable heating and hot water performance.

Product Specifications

• Manufacturer – Viessmann
• Manufacturer Part Number (MPN) – 7828749
• Product Type – Flow Sensor
• Typical Applications / Use Cases – Boiler repairs and servicing; replacement flow sensor for compatible Viessmann heating systems

Why Buy from BHL

Viessmann is a leading heating brand known for reliable, high-efficiency boiler technology and quality spare parts. Choose the Viessmann 7828749 flow sensor for a dependable replacement matched to manufacturer specifications. Buy online from BHL, a specialist online merchant trusted by thousands of satisfied customers since 1998 with thousands of 5 star reviews. Enjoy competitive pricing, free* and fast UK delivery, and careful dispatch from UK warehouses. Order today for a genuine spare delivered with care.
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Reviews

Buying guide: Boiler Spares

Boiler spares are replacement parts for gas, LPG and oil boilers: printed circuit boards, fans, gas valves, pumps, diverter valves, heat exchangers, sensors, pressure gauges, burners, electrodes, seals, casing panels and flue parts. Most are made for one manufacturer, and often for a narrow range of models, so identifying the boiler correctly matters more than anything else.

Identify the boiler first

Find the data badge, usually behind the front panel or under the controls cover. It shows the manufacturer, the model and the GC (Gas Council) number, a seven-digit reference for the exact appliance. Natural gas and LPG versions of the same boiler usually have different GC numbers, and parts can change between production runs, so the GC number and serial number are the safest way to match a part. The boiler's installation and servicing manual lists the parts for each model.

Part numbers and replacements

Search by the manufacturer's part number where you have it. Manufacturers sometimes replace a part with a newer version under a new number; only use a replacement that the manufacturer lists for your model. Some repairs need a kit rather than a single part, for example a part supplied with new seals or fixings.

Safety

By law, work on gas boilers and their gas parts must be carried out by a Gas Safe registered engineer qualified for that type of appliance; ask to see their ID card before work starts. Oil boilers should be worked on by a suitably qualified technician.

For thermostats and programmers, see heating controls.

Shop all Boiler Spares

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