Checking hours…Mon–Fri 7:30am–5pm · Sat 9am–12pm01302 279234Trade account
Sime Gas Valve Sit 845 Sigma 240V SIME6243820

Sime

Sime Gas Valve Sit 845 Sigma 240V SIME6243820

Sime Sit 845 Sigma 240V gas valve, part 6243820, a direct replacement for 6243810 in Sime gas heating appliances.

At a glance

  • Part type: Gas valve
  • Also known as 6265600, SIME6243820
  • This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Manufacturer part no.
6243820
Showing prices

£198.82

£165.68 ex. VAT · VAT at 20%

In stock
Cut-off passed — dispatches next working day
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 6243820 is a Sit 845 Sigma gas valve rated at 240V, supplied as a replacement for part number 6243810. It forms part of the gas train on Sime heating appliances, where it opens and closes the gas supply to the burner on command from the appliance control board. Because it is an electrically operated component with moving internal parts, it is a service item that is renewed when it stops sealing or opening correctly.

Signs this part needs replacing

  • The burner fails to light, or lights only intermittently, when there is a call for heat.
  • The flame extinguishes shortly after ignition and the appliance goes to lockout.
  • Repeated lockouts occur during a demand for heating or hot water.
  • No gas reaches the burner even though the control board is calling for it.
  • The flame is unstable or modulation is erratic, with the appliance unable to hold a steady output.

Before you order

  • Check the appliance data badge and confirm the model and GC number before ordering.
  • Confirm the valve currently fitted carries the number 6243810 or 6243820, as this part is the listed replacement for 6243810.
  • This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.

Not sure which part?

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