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Johnson & Starley Thermocouple 1000-0702030

Johnson & Starley

Johnson & Starley Thermocouple 1000-0702030

Thermocouple for Johnson & Starley Eljan, Janus, Superjan, SCS and Hispec appliances.

At a glance

  • Part type: thermocouple
  • Also known as 1690487
Manufacturer part no.
1000-0702030
Showing prices

£32.96

£27.47 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 Johnson & Starley 1000-0702030 is a thermocouple used across a range of Johnson & Starley water heaters, warm air units and boilers. It sits in the pilot flame assembly and generates the small voltage that holds the gas valve open while a flame is proven. If the thermocouple stops producing that signal, the pilot will not stay lit and the appliance will not run.

Signs this part needs replacing

  • The pilot flame lights but goes out as soon as the control knob is released
  • The pilot will not stay lit long enough for the main burner to fire
  • Repeated pilot outages on the same appliance with no other obvious cause
  • The appliance locks out or shuts down shortly after ignition
  • Visible damage, sooting or corrosion at the thermocouple tip or its connection

Before you order

  • Confirm the appliance model against the fit list above, as the same part number covers several Johnson & Starley families
  • Check the model and GC number on the appliance data plate before ordering
  • Compare the part number on the existing thermocouple with 1000-0702030 where it is still legible
  • Check the thermocouple connection and lead length against the failed part before fitting

Not sure which part?

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