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Potterton Klixon S502259

Potterton

Potterton Klixon S502259

Klixon thermal switch marked 100 4°C, Potterton part S502259, for the Potterton Derwent Prestige PLUS gas boiler.

At a glance

  • Appliance family: Potterton Derwent Prestige PLUS
  • Also known as 1126136
Manufacturer part no.
S502259
Showing prices

£109.20

£91.00 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 S502259 is a Klixon thermal switch marked 100 4°C, supplied for Potterton gas boilers. It is used in the temperature control circuit of the appliance. It is listed for the Potterton Derwent Prestige PLUS.

Signs this part needs replacing

  • Boiler locks out or shuts down unexpectedly during a heating cycle
  • Boiler fails to fire, or fires intermittently
  • Overheat fault codes or repeated lockouts requiring a manual reset
  • Erratic temperature control or short cycling

Before you order

  • Confirm the appliance is a Potterton Derwent Prestige PLUS
  • Check the part number S502259 against the component being replaced
  • Verify the marking on the existing Klixon matches 100 4°C
  • Isolate the electrical supply before removing or fitting the switch

Not sure which part?

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