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Hamworthy Thermocouple 747439864

Hamworthy

Hamworthy Thermocouple 747439864

Hamworthy thermocouple 747439864 for Purwell and Ur series permanent pilot floor standing boilers.

At a glance

  • Also known as 2063820
Manufacturer part no.
747439864
Showing prices

£26.29

£21.91 ex. VAT · VAT at 20%

Available to order · 1 working day
Available to order · 1 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 Hamworthy 747439864 is a thermocouple used in Hamworthy gas appliances. It sits in the pilot flame path and generates the small voltage that holds the gas valve open while the pilot is lit. It is listed under the catalogue references Q309A2754B-36" or Q309A2788 and is suited to permanent pilot floor standing boiler ranges.

Signs this part needs replacing

  • The pilot flame will not stay lit once the control knob is released.
  • The pilot lights but the boiler drops out shortly afterwards.
  • Repeated lockouts or loss of the pilot on the same appliance.
  • The pilot flame has to be held manually for an extended period before the valve stays open.
  • Visible damage, sooting or a loose connection at the thermocouple tip or its terminal.

Before you order

  • Check the appliance model and confirm it appears in the fits list above.
  • Confirm whether the boiler is a permanent pilot type, as listed against this thermocouple.
  • Match the catalogue reference against the thermocouple being removed, whether Q309A2754B-36" or Q309A2788.
  • Check the condition of the pilot assembly and its connections before ordering, so any associated faults are identified at the same time.

Not sure which part?

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