Sime
Sime Safety Thermostat 6001409
Safety thermostat for Sime Murelle HE boilers, cuts power at 100°C to prevent overheating.
At a glance
- Also known as 8921919
Showing prices
£114.50
£95.42 ex. VAT · VAT at 20%
Available to order · 3 working days
Available to order · 3 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Sime 6001409 is a safety thermostat (high limit stat) rated at 100°C. It is designed for Sime Murelle HE boilers, where it acts as a safety cut-out to interrupt the power supply if the boiler temperature exceeds 100°C.
Signs this part needs replacing
- Boiler locks out and will not reset
- Overheat fault code displayed
- Boiler fires then shuts down after a short period
- No heating or hot water
- Manual reset button on the thermostat has tripped
Before you order
- Confirm your boiler model matches one listed in the Fits section
- Check the existing thermostat part number (6001409) on the component
- Ensure the boiler is isolated from the electrical supply before replacement
- Refer to the boiler manufacturer's instructions for safe replacement
Compliance
| Alternative numbers | 8921919 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| SIME MURELLE HE 110 R - 8104960 | 41-283-28 | 41-283-28 | — | — |
| SIME MURELLE HE 110 R M - 8104990 | — | — | — | |
| SIME MURELLE HE 50 R M MET - 8111201 | — | — | — | |
| SIME SIME MURELLE HE 50 R M MET | — | — | — |
Fitment listings are a guide, not a guarantee. Plant-room assemblies get modified on site more often than not. Send us the GC number off the data badge and a photo of the existing valve and we will confirm before anything is dispatched.
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 technical questions yet for this part.
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