Potterton
Potterton Thermostat 105C 5142391
Potterton 5142391 thermostat rated 105C for Potterton Commercial Sirius 2 and Sirius 3 FS boilers.
£10.32
£8.60 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 Potterton 5142391 is a 105C thermostat used in Potterton Commercial boiler appliances. It forms part of the temperature control circuit, switching in response to the temperature it senses within the appliance. This part is listed for the Potterton Commercial Sirius 2 and Sirius 3 FS boiler ranges.
Signs this part needs replacing
- The boiler runs beyond the expected temperature instead of modulating or shutting down
- Overheat faults or lockouts recur during normal operation
- Heating or hot water output is erratic or is lost altogether
- Temperature readings from the appliance do not match actual system conditions
Before you order
- Confirm the appliance model matches one of the Sirius 2 or Sirius 3 FS variants listed in the Fits section
- Check the existing thermostat is rated 105C and that the part number 5142391 corresponds to the component being replaced
- Inspect the thermostat and its wiring connections for damage before ordering, so any related faults are identified at the same time
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| POTTERTON COMMERCIAL POTTERTON COMMERCIAL SPARES | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 2 FS110 | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 2 FS50 | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 2 FS70 | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 2 FS90 | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 3 FS110 | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 3 FS50 | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 3 FS70 | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 3 FS90 | — | — | — |
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.
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