Alpha
Alpha Overheat Thermostat 1.019147
Overheat thermostat rated at 105°C for Alpha HE series gas boilers, part number 1.019147.
At a glance
- Also known as OVERHEAT-THERMOSTAT-105-C, 1257561
£27.29
£22.74 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 Alpha 1.019147 is an overheat thermostat rated at 105°C, used in Alpha HE series gas boilers. It monitors boiler temperature and interrupts the heating circuit if the set limit is exceeded, protecting the appliance from overheating. It is a service component for the Alpha HE range.
Signs this part needs replacing
- Boiler locks out and requires a manual reset, repeatedly.
- Overheat trip operates before the boiler reaches normal operating temperature.
- No heating or hot water despite a call for heat, with the overheat thermostat open.
- Boiler fires then shuts down shortly after, cycling on the overheat limit.
Before you order
- Confirm your boiler model and GC number against the fitment list above.
- Check the existing thermostat's temperature rating matches 105°C.
- Verify the part number 1.019147 on the existing component or in the manufacturer's parts list.
Compliance
| GC number | H28-384 |
|---|---|
| Alternative numbers | OVERHEAT-THERMOSTAT-105-C, 1257561 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ALPHA ALPHA HE CB25 | — | — | — | |
| ALPHA ALPHA HE CB33 | — | — | — | |
| ALPHA ALPHA HE SY25 | — | — | — | |
| ALPHA HE CB25 | 47-532-25 | 47-532-25 | — | — |
| ALPHA HE CB25 (LPG) | 47-532-27 | 47-532-27 | — | — |
| ALPHA HE CB33 | 47-532-26 | 47-532-26 | — | — |
| ALPHA HE CB33 (LPG) | 47-532-44 | 47-532-44 | — | — |
| ALPHA HE SY25 | 41-532-07 | 41-532-07 | — | — |
| ALPHA HE SY25 (LPG) | 41-532-12 | 41-532-12 | — | — |
| ALPHA HE25 | 47-532-41 | 47-532-41 | — | — |
Showing 10 of 13 compatible appliances.
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.
ALPHA appliance manual — HE CB25 (GC 47-532-25), HE CB25 (LPG) (GC 47-532-27), HE CB33 (GC 47-532-26), HE CB33 (LPG) (GC 47-532-44), HE SY25 (GC 41-532-07), HE SY25 (LPG) (GC 41-532-12)
manualmanualALPHA appliance manual — HE25 (GC 47-532-41), HE25 (LPG) (GC 47-532-42), HE33 (GC 47-532-43), HE33 (LPG) (GC 47-532-44)
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