Potterton
Potterton Flow Controller NXR4-9 5139879
Potterton flow controller NXR4-9, part 5139879, for Potterton Commercial NXR4I boiler sections.
At a glance
- Appliance family: Potterton Commercial NXR4I
£359.02
£299.18 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 CONTROLLER NXR4-9 is a Potterton Commercial flow controller supplied under part number 5139879. It is listed in the flow switch category of gas boiler spares and is used on Potterton Commercial NXR4I appliances. The component monitors water flow through the boiler and provides the signal that allows the burner to run only when flow is proven.
Signs this part needs replacing
- The boiler fails to fire on a call for heat despite the pump running and flow being present.
- The burner lights briefly and then locks out during a demand.
- Intermittent operation, with the appliance running normally on some demands but not others.
- Fault codes or diagnostic indications relating to flow or water pressure proving on the NXR4I.
Before you order
- Confirm the appliance is a Potterton Commercial NXR4I and note the section count, as listed in the fitment data.
- Check the existing flow controller against the part number 5139879 before ordering.
- Verify the fault is with the flow controller rather than the pump, system flow rate or wiring to the switch.
- Isolate the electrical supply and the water connections before any work on the boiler.
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| POTTERTON COMMERCIAL NXR4I 10 SECTION | — | — | — | |
| POTTERTON COMMERCIAL NXR4I 11 SECTION | — | — | — | |
| POTTERTON COMMERCIAL NXR4I 12 SECTION | — | — | — | |
| POTTERTON COMMERCIAL NXR4I 13 SECTION | — | — | — | |
| POTTERTON COMMERCIAL NXR4I 14 SECTION | — | — | — | |
| POTTERTON COMMERCIAL NXR4I 8 SECTION | — | — | — | |
| POTTERTON COMMERCIAL NXR4I 9 SECTION | — | — | — | |
| POTTERTON COMMERCIAL POTTERTON COMMERCIAL SPARES | — | — | — |
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.
Not sure which part?
Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.