Description
The Viessmann 222-F FS2A DHW Heat Exchanger 7831659 is a genuine brand-new replacement heat exchanger designed for selected Viessmann boilers. This CB10-26 B2TX 35 heat exchanger carries manufacturer part number 7831659 and comes with a 12-month warranty. Always check your boiler model, GC number, serial number and part number before ordering.
The domestic hot water heat exchanger transfers heat from the primary heating circuit to the domestic water supply. A faulty or blocked heat exchanger may cause poor hot water flow, temperature fluctuations or reduced hot water performance. Installation should be completed by a suitably qualified Gas Safe registered engineer.
Product Details
Brand: Viessmann
Part Type: DHW Heat Exchanger
Model: CB10-26 B2TX 35
MPN: 7831659
Warranty: 12 Months
Condition: Genuine Brand New
Boiler Compatibility
Viessmann 111 WB1LD
Fits Appliance GC No.
111 WB1LD 35kW (Serial No. 7570733) 47-819-44
Viessmann 111-W B1LB
Fits Appliance GC No.
111-W B1LB 35kW (Serial No. 7543449) Information not provided
Viessmann 222-F FS2A
Fits Appliance GC No.
222-F FS2A 26kW (Serial No. 7374977) 47-819-16
222-F FS2A 35kW (Serial No. 7374978) 47-819-17
Viessmann 222-F FS2B
Fits Appliance GC No.
222-F FS2B 26kW (Serial No. 7438013) Information not provided
Before ordering, please check your boiler model, GC number, serial number and Viessmann manufacturer part number 7831659 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 DHW 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 7831659 heat exchanger compatible with my boiler?
The heat exchanger is compatible with the listed Viessmann 111 WB1LD, 111-W B1LB, 222-F FS2A and 222-F FS2B models. Always check your boiler model, serial number and part number before ordering.
What does the Viessmann 7831659 heat exchanger do?
It transfers heat from the boiler’s primary heating circuit to the domestic water supply, helping provide hot water at the required temperature.
What are the symptoms of a faulty or blocked DHW heat exchanger?
Common signs include poor hot water flow, fluctuating water temperature, reduced hot water performance and difficulty maintaining the desired hot water temperature.
How do I confirm that 7831659 is the correct replacement?
Check your boiler model, GC number and serial number, then confirm that Viessmann manufacturer part number 7831659 matches the original component or official appliance parts information.
Does this heat exchanger come with a warranty?
Yes. This genuine brand-new Viessmann DHW heat exchanger 7831659 comes with a 12-month warranty.
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