Keston
Keston Flow/Return Thermistor C17204000
Keston flow/return thermistor, part number C17204000, for C-series condensing gas boilers.
At a glance
- Also known as 1632835
£28.72
£23.93 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 FLOW/RETURN THERMISTOR is a Keston temperature sensing component, identified by part number C17204000. It is fitted to Keston C-series condensing boilers to monitor flow and return water temperature. The thermistor provides temperature feedback to the boiler control, which uses it to regulate combustion and pump operation.
Signs this part needs replacing
- Boiler locks out or fails to fire after reaching temperature
- Temperature readings that do not match the actual flow or return pipe temperature
- Heating or hot water output fluctuating without a clear system cause
- Boiler cycling short and frequently during a demand for heat
- Fault indication relating to temperature sensing on the boiler control
Before you order
- Confirm the boiler model and, where applicable, the GC number against the fitment list
- Check the existing thermistor part number against C17204000
- Verify the location and connector type of the thermistor on the appliance before removal
- Refer to the boiler manufacturer's instructions for the correct removal and refitting procedure
Compliance
| Barcode / EAN | 5060033534625 |
|---|---|
| Alternative numbers | 1632835 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| KESTON C110 CONDENSING BOILER | — | — | — | |
| KESTON C40 CONDENSING BOILER - NAT GAS | 41-930-07 | 41-930-07 | — | — |
| KESTON C40P CONDENSING BOILER - LPG | 41-930-08 | 41-930-08 | — | — |
| KESTON C55 CONDENSING BOILER - NAT GAS | 41-930-09 | 41-930-09 | — | — |
| KESTON C55P CONDENSING BOILER - LPG | 41-930-10 | 41-930-10 | — | — |
| KESTON C90 CONDENSING BOILER | — | — | — |
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.
KESTON appliance manual — C110 CONDENSING BOILER, C90 CONDENSING BOILER
manualmanualKESTON appliance manual — C40 CONDENSING BOILER - NAT GAS (GC 41-930-07), C40P CONDENSING BOILER - LPG (GC 41-930-08), C55 CONDENSING BOILER - NAT GAS (GC 41-930-09), C55P CONDENSING BOILER - LPG (GC 41-930-10)
manualNo technical questions yet for this part.
Not sure which part?
Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.