Viessmann 100-W WB1A Combi 12 Plate Heat Exchanger 7823858

Description

The Viessmann 100-W WB1A Combi 12 Plate Heat Exchanger 7823858 is a genuine brand-new replacement component designed for selected Viessmann Vitodens 100-W WB1A Combi boilers. Supplied under manufacturer part number 7823858, this plate heat exchanger comes with a 12-month warranty. Before ordering, always confirm your boiler model, GC number, serial number and manufacturer part number to ensure compatibility.

The 12 plate heat exchanger transfers heat from the primary heating circuit to the domestic hot water supply without mixing the two water systems. A blocked or faulty plate heat exchanger may cause poor hot water performance, fluctuating water temperatures or reduced boiler efficiency. As this component forms part of the boiler’s water system, installation should be carried out by a suitably qualified Gas Safe registered engineer.

Product Details

Brand: Viessmann
Part Type: 12 Plate Heat Exchanger
MPN: 7823858
Warranty: 12 Months
Condition: Genuine Brand New

Boiler Compatibility

The Viessmann 100-W WB1A Combi 12 Plate Heat Exchanger 7823858 is compatible with the following Viessmann Vitodens 100-W WB1A Combi boilers.

Fits Appliance GC No.
100-W WB1A 24kW Combi (Serial No. 7179917) 47-819-04
100-W WB1A 30kW Combi (Serial No. 7179916) 47-819-05

Before ordering, please check your boiler model, GC number, serial number and Viessmann manufacturer part number 7823858 to ensure this is the correct replacement part for your appliance.

Delivery & Collection

Collection is available from our Newcastle showroom at Unit 5, Penn Street, Newcastle upon Tyne, NE4 7BG, subject to stock availability. We also offer fast UK delivery via Royal Mail First Class or DPD Next Day, with most orders arriving within one to two working days. Boiler components should be installed by a suitably qualified Gas Safe registered engineer.

Warranty

This brand-new genuine Viessmann boiler 12 plate heat exchanger is supplied with a 12-month warranty. Warranty claims may be subject to inspection and confirmation that the component was correctly selected and professionally installed.

Returns

We accept returns within 30 days of delivery. The product must be unused, unfitted and returned in its original unopened packaging with all seals intact. We cannot accept returns for components that have been fitted, used, damaged or returned in an unsuitable condition. Please check the boiler model, GC number, edition, serial-number range and part number carefully before ordering.

If you need any help, our team is happy to assist. Please contact us by phone or WhatsApp chat.

Frequently Asked Questions

Is the Viessmann 7823858 plate heat exchanger compatible with all Vitodens 100-W boilers?

No. This 12 plate heat exchanger is compatible only with the listed Viessmann Vitodens 100-W WB1A Combi models. Always confirm your boiler model, GC number, serial number and manufacturer part number before ordering.

What does the 12 plate heat exchanger do?

The plate heat exchanger transfers heat from the boiler’s primary circuit to the domestic hot water supply, providing hot water without mixing the two water systems.

What are the signs of a faulty plate heat exchanger?

Common symptoms include hot water running hot and cold, reduced hot water flow, poor hot water temperature, kettling noises or a loss of hot water performance. These symptoms may also have other causes, so a professional diagnosis is recommended.

Can a blocked plate heat exchanger affect hot water?

Yes. Limescale or debris can restrict water flow through the heat exchanger, resulting in poor or inconsistent hot water performance.

Is this a genuine Viessmann replacement part?

Yes. This is a genuine brand-new Viessmann replacement part.