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Glow-worm Fuelsaver thermocouple T37-600/I

Thermocouple

Glow-worm Fuelsaver thermocouple T37-600/I

600mm interrupted-type thermocouple, cross-referenced to Glow-worm CH501/502 and Fuelsaver 15CF/RS boilers, and the wider Glow-worm Fuelsaver MK2 range.

At a glance

  • Also known as 1700445
  • Have the replacement fitted and tested by a Gas Safe registered engineer
Manufacturer part no.
T37-600/I
Showing prices

£25.21

£21.01 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

A 600mm interrupted-type thermocouple (the pilot circuit is broken between the thermocouple and the gas valve's power pack), stocked as a cross-reference for the Glow-worm CH501/502 and Fuelsaver 15CF/RS boilers, and used across the wider Glow-worm Fuelsaver MK2 range (30, 40, 50, 60 and 75, in B, BR, C and R variants).

Signs this part needs replacing

  • Pilot light won't stay alight, or goes out as soon as the control knob is released
  • The pilot button needs holding in for longer than normal before the flame stays lit
  • Boiler locks out or won't fire even though the pilot is burning correctly
  • Visible corrosion, discolouration or damage to the interrupter connector

Before you order

  • Confirm the length and connection type match the thermocouple you're removing
  • Note that this is an interrupted-type thermocouple, not a standard type
  • Isolate the gas supply before removing the old thermocouple
  • Have the replacement fitted and tested 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.