Thermocouple
Thermocouple T99-230/M9 Johnson & Starley Type
Thermocouple of the Johnson & Starley type, supplied under part number T99-230/M9.
At a glance
- Also known as 1700340
£36.43
£30.36 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The T99-230/M9 is a thermocouple of the Johnson & Starley type, listed within the gas boiler spares category as a thermocouple assembly. A thermocouple of this kind sits in the pilot flame path and generates the small millivolt signal that holds the gas valve open while a flame is proven. It is a service item held for Johnson & Starley appliance work rather than a component tied to one specific model listing.
Before you order
- Confirm the part number T99-230/M9 against the reference on the existing thermocouple or the appliance documentation.
- Check the Johnson & Starley type designation matches the appliance being worked on.
- Inspect the pilot assembly and lead routing before fitting, as thermocouple faults are often traced to the pilot burner or connection rather than the probe itself.
- Gas work must be carried out by a competent, registered engineer.
Compliance
| Alternative numbers | 1700340 |
|---|
No fitment data held for this part.
Documents & drawings
Everything we hold for this part. Where a document exists but we don't hold it, the technical team will source it from the manufacturer — usually the same working day.
No documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
No technical questions yet for this part.
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