Viessmann
Viessmann High Limit Switch 100C-6 36TXVE21
Viessmann 7831404 high limit switch for Vitodens 100W Compact boilers, marked 100C-6 and 36TXVE21.
At a glance
- Also known as 2321104
£51.80
£43.17 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Viessmann HIGH LIMIT SWITCH 100C-6 36TXVE21 is a safety limit switch used in Viessmann Vitodens 100W Compact gas boilers. It monitors temperature at its sensing point and interrupts the burner circuit if the set limit is exceeded, preventing the appliance from running on past a safe operating temperature. The switch carries the markings 100C-6 and 36TXVE21 and is identified by Viessmann part number 7831404.
Signs this part needs replacing
- The boiler locks out or shuts down on an overheat condition
- Repeated lockouts that clear after the appliance has cooled
- The burner fails to fire because the limit circuit stays open
- A fault code relating to overheat or limit switch operation is displayed
- Visible damage, scorching or a loose connection at the switch
Before you order
- Confirm the boiler model is a Vitodens 100W Compact
- Check the appliance serial number against the fitment list
- Compare the markings on the existing switch (100C-6, 36TXVE21) with this part
- Confirm the Viessmann part number 7831404 matches the number on the failed component
Compliance
| Alternative numbers | 2321104 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VIESSMANN VITODENS 100W COMPACT 13KW SERIAL No. 7416307 | 41-819-21 | 41-819-21 | — | — |
| VIESSMANN VITODENS 100W COMPACT 16KW SERIAL No. 7416302 | 41-819-22 | 41-819-22 | — | — |
| VIESSMANN VITODENS 100W COMPACT 19KW SERIAL No. 7416303 | 41-819-23 | 41-819-23 | — | — |
| VIESSMANN VITODENS 100W COMPACT 26KW SERIAL No. 7416304 | 41-819-24 | 41-819-24 | — | — |
| VIESSMANN VITODENS 100W COMPACT 35KW SERIAL No. 7499606 | 41-819-25 | 41-819-25 | — | — |
Documents & drawings
Everything we hold for this part. Where a document exists but we don't hold it, the technical team will source it from the manufacturer — usually the same working day.
No documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
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