Potterton
Potterton Flow Controller NXR4-11 5139881
Flow controller for Potterton Commercial NXR4I commercial gas boilers, from 8 to 14 sections, part number 5139881.
£335.93
£279.94 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 Commercial flow controller NXR4-11 (part number 5139881) is a flow switch component used on Potterton Commercial NXR4I series gas boilers. It monitors water flow through the appliance and signals the control circuit, allowing the boiler to prove circulation before and during burner operation. It is supplied as a single flow controller.
Signs this part needs replacing
- The boiler locks out or shows a flow-related fault during or shortly after a demand for heat
- The pump runs but the burner fails to fire, with the boiler not proving circulation
- Operation is intermittent, with the boiler cutting out and resetting repeatedly
- Flow proving is unreliable, causing nuisance lockouts that clear on reset but return
Before you order
- Confirm the boiler is an NXR4I model and note the section count so the correct variant is ordered
- Check the existing flow controller and match it against part number 5139881
- Verify the fault lies with the flow controller rather than with the pump, system circulation or water level
- Confirm the appliance details on the boiler data plate before ordering
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
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