Description
The Viessmann 7825490 thermal switch is a brand-new genuine 99°C fixed high-limit component for selected Viessmann Vitodens 100-W, 200-W and 222-F boilers. It is supplied with a 12-month warranty and should only be ordered after confirming the complete appliance model, serial number and manufacturer part number.
The thermal switch monitors the boiler temperature and acts as a high-limit safety component when the specified temperature threshold is reached. Boiler safety components should be diagnosed and installed by a suitably qualified Gas Safe registered engineer.
Product Details
Brand: Viessmann
Part type: Thermal switch / fixed high limit
MPN: 7825490
Warranty: 12 months
Condition: New
Boiler Compatibility
Viessmann Vitodens 100-W WB1B
100-W WB1B 26kW Combi — Serial No. 7373061 — GC No. 47-819-12
100-W WB1B 26kW System — Serial No. 7373060 — GC No. 41-819-18
100-W WB1B 30kW Combi — Serial No. 7373063 — GC No. 47-819-13
100-W WB1B 30kW System — Serial No. 7373062 — GC No. 41-819-19
100-W WB1B 35kW Combi — Serial No. 7373065 — GC No. 47-819-14
100-W WB1B 35kW System — Serial No. 7373064 — GC No. 41-819-20
Viessmann Vitodens 200-W WB2B
200-W WB2B 45kW System — Serial No. 7194486
200-W WB2B 45kW System — Serial No. 7373009
200-W WB2B 60kW System — Serial No. 7194487
200-W WB2B 60kW System — Serial No. 7373010
Viessmann Vitodens 200-W WB2C
200-W WB2C 45kW System — Serial No. 7438087
200-W WB2C 60kW System — Serial No. 7438089
200-W WB2C 80kW System — Serial No. 7424189
200-W WB2C 105kW System — Serial No. 7424191
Viessmann Vitodens 222-F FS2B
222-F FS2B 26kW — Serial No. 7438013
Delivery & Collection
Collection is available from our Newcastle showroom at Unit 5, Penn Street, Newcastle upon Tyne, NE4 7BG, usually on the same day, subject to stock availability. If the item is not in stock, collection is normally available the next working day. We also offer fast UK delivery through 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 thermal switch 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 this thermal switch compatible with the Viessmann Vitodens 100-W?
Yes. Viessmann part 7825490 fits the confirmed Vitodens 100-W WB1B models listed above. The boiler output, appliance type, GC number and serial number should be checked before ordering.
How can I confirm that Viessmann 7825490 is the correct replacement?
Check the manufacturer part number on the existing component or appliance parts information and compare it with 7825490. You should also verify the complete boiler model, GC number and serial number.
What does the 99°C fixed high-limit thermal switch do?
The thermal switch monitors temperature and acts as a high-limit safety component when the specified temperature threshold is reached. Its operation should be tested as part of a professional boiler diagnosis.
What symptoms may be associated with a faulty thermal switch?
Possible symptoms may include the boiler shutting down, overheating protection activating or the appliance entering a fault condition. These symptoms do not prove that the thermal switch is defective, as other boiler components can produce similar issues.
Does this Viessmann thermal switch require professional installation?
Yes. A thermal switch is a boiler safety component and should be diagnosed, replaced and tested by a suitably qualified Gas Safe registered engineer.
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