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Sime Water Flow Switch 6149303

Sime

Sime Water Flow Switch 6149303

Water flow switch for Sime gas boilers, part number 6149303, used to detect water flow and signal demand to the boiler.

At a glance

  • Also known as 2042336
Manufacturer part no.
6149303
Showing prices

£114.85

£95.71 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 Sime 6149303 is a water flow switch used in Sime gas boilers. It detects water flow through the appliance and signals the boiler to respond to a demand. It is listed under gas boiler spares in the switches category.

Signs this part needs replacing

  • Boiler does not fire when a hot water tap is opened
  • Domestic hot water demand is not recognised
  • Intermittent or fluctuating hot water temperature
  • Flow-related fault code shown on the boiler display
  • Pump runs but the burner does not light on a DHW call

Before you order

  • Check your boiler model against the fit list above
  • Confirm the part number on the existing switch is 6149303
  • Check whether your appliance is a system, combi or open-vent model
  • Have the boiler model and serial details to hand

Not sure which part?

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