Thorn
Ranco Boiler Thermostat C77 P0105
Ranco C77 P0105 boiler thermostat for selected Thorn Olympic gas boiler models.
At a glance
- Also known as 1960038
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£0.01
£0.01 ex. VAT · VAT at 20%
In stock
Cut-off passed — dispatches next working day
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 Ranco C77 P0105 is a boiler thermostat for Thorn Olympic gas boilers. It is a thermostat component listed within gas boiler spares. Its role is to sense and control boiler temperature.
Signs this part needs replacing
- Boiler does not reach or hold the set temperature.
- Boiler overheats or continues firing after the set point is reached.
- Frequent short cycling as the thermostat cuts in and out.
- Heating or hot water temperature is erratic despite control adjustments.
- No change in boiler operation when the thermostat is adjusted.
Before you order
- Confirm the boiler model and variant from the appliance data badge.
- Check the existing thermostat is marked C77 P0105 or C77P0105.
- Confirm the appliance is one of the listed Thorn Olympic models.
- Gas appliance work should be carried out by a competent person.
Compliance
| GC number | 382-322 |
|---|---|
| Barcode / EAN | 5039177518815 |
| Alternative numbers | 1960038 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| RANCO THERMOSTATS | — | — | — | |
| THORN OLYMPIC 20/35B | 41-789-21 | 41-789-21 | — | — |
| THORN OLYMPIC 20/35CF | 41-789-42 | 41-789-42 | — | — |
| THORN OLYMPIC 20/35F | 41-789-65 | 41-789-65 | — | — |
| THORN OLYMPIC 38/50B | 41-789-20 | 41-789-20 | — | — |
| THORN OLYMPIC 38/50CF | 41-789-43 | 41-789-43 | — | — |
| THORN OLYMPIC 38/50F | 41-789-66 | 41-789-66 | — | — |
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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Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.