Sime Heating 6300800 Post Condenser, Boiler Condenser Unit, Flue Condensate Heat Exchanger Replacement Spare

Name: Sime Heating 6300800 Post Condenser, Boiler Condenser Unit, Flue Condensate Heat Exchanger Replacement Spare
Brand: BHL
SKU: W-477429
Price: 661.85 GBP
Availability: InStock

SKU W-477429

Manufacturer part number: 6300803

£661.85

inc VAT£551.54 ex VAT

Lead time: 1-5 working days

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Delivery

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Description

Product Overview

The Sime Heating 6300800 post condenser is a boiler spare designed for maintaining correct condensate management and efficient operation within compatible Sime heating systems. Ideal for servicing and repair work, it helps restore performance and reliability where a worn or faulty condenser component is causing issues.

Key Features

Direct replacement boiler spare – helps you complete repairs quickly and return a boiler to safe, stable operation.
Designed for compatible Sime systems – improves fit and function versus non-matching parts, reducing call-backs.
Supports efficient condensing performance – helps maintain correct handling of condensate and flue by-products for smoother running.
Ideal for servicing and breakdown repairs – a practical part to keep boilers working reliably in domestic and light commercial settings.

Use Case / Application

Suitable for use as a replacement post condenser within compatible Sime boiler assemblies. Commonly installed during planned servicing, emergency breakdown repairs, or when diagnosing symptoms such as reduced efficiency, persistent fault codes, or condensate-related leaks. Typical environments include homes, flats, plant rooms, utility rooms and other locations where Sime boilers are installed.

Problem → Solution

Ideal for replacing a damaged or inefficient post condenser to help resolve condensate-related performance issues and keep your boiler running as intended.

Product Specifications

• Manufacturer – Sime Heating
• Manufacturer Part Number (MPN) – 6300803
• Product Type – Post Condenser (Boiler Spare Part)

Why Buy from BHL?

Sime Heating is known for dependable heating components, and the 6300800 post condenser is a key replacement part for maintaining compatible boiler systems. Buy online from BHL for competitive pricing, genuine parts where supplied, and free* & fast UK delivery. BHL are a specialist online merchant trusted by thousands of satisfied customers online since 1998, with thousands of 5 star reviews. Orders are delivered with care from UK warehouses. *see our terms

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