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Alpha overheat thermostat manual reset 6.9950570

Alpha

Alpha overheat thermostat manual reset 6.9950570

Genuine Alpha manual-reset overheat thermostat, part number 6.9950570, a safety cut-out for the primary heat exchanger.

At a glance

  • Also known as LIMIT-TSTAT-ONLY-105DEG-240XE, 1257633
  • poor circulation or limescale) that should be diagnosed first; this is gas appliance work and should be carried out by a Gas Safe registered engineer
Manufacturer part no.
6.9950570
Showing prices

£70.84

£59.03 ex. VAT · VAT at 20%

Available to order · 7 working days
Available to order · 7 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

This is the manual-reset overheat thermostat fitted to affected Alpha boilers, a safety device that shuts the boiler down if the primary heat exchanger runs dangerously hot, and must be reset by hand once the fault is cleared. It is a genuine Alpha part, number 6.9950570.

Signs this part needs replacing

  • Boiler locks out repeatedly on an overheat fault code
  • The reset button trips again shortly after being pressed
  • No continuity across the thermostat when tested by an engineer
  • Visible heat damage around the thermostat housing

Before you order

  • Match this part number against the thermostat fitted to your boiler
  • Isolate electrical power to the boiler before working on this part
  • Repeated overheat trips can indicate a separate fault (e.g. poor circulation or limescale) that should be diagnosed first; this is gas appliance work and should 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.