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Potterton Flow Switch 5110516

Potterton

Potterton Flow Switch 5110516

Potterton flow switch 5110516 for Suprima L gas boilers, detecting water flow before the boiler fires.

At a glance

  • Appliance family: Suprima L
  • Also known as 1123707
Manufacturer part no.
5110516
GC number
H04-872
Showing prices

£78.00

£65.00 ex. VAT · VAT at 20%

Available to order · 3 working days
Available to order · 3 working days
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 Potterton 5110516 is a flow switch used in Potterton Suprima L gas boilers. It monitors water circulation through the appliance and signals the control board that flow is present, allowing the boiler to fire safely. It replaces the earlier code 5109198.

Signs this part needs replacing

  • Boiler fails to fire on a call for heat or hot water despite the pump running
  • Intermittent lockouts that clear on reset, particularly after the appliance has been running
  • Boiler short-cycles or cuts out before reaching temperature
  • Overheat trips or a dry-fire fault where circulation is present but not detected
  • No change in boiler behaviour when the flow switch is manually actuated during diagnosis

Before you order

  • Confirm the appliance model against the Suprima L range and check the data badge
  • Check the GC number on the data badge matches your appliance variant
  • Isolate the electrical supply and shut off the water before removing the existing switch
  • Inspect the wiring plug and switch housing for damage or debris before fitting

Not sure which part?

Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.