Johnson & Starley
Johnson & Starley Thermocouple Exchange Kit S00399
Thermocouple exchange kit for Johnson & Starley Janus 3 water heaters and Janus 3-30 hot water circulators.
At a glance
- Also known as 1690536
- Installation must be carried out by a Gas Safe registered engineer
£36.97
£30.81 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 Johnson & Starley S00399 is a thermocouple exchange kit for Janus 3 gas appliances. The thermocouple sits in the pilot flame and provides the signal that keeps the gas valve open. It is used across the Janus 3 water heater and hot water circulator range.
Signs this part needs replacing
- Pilot flame goes out when the control knob is released
- Boiler or water heater fails to stay lit after ignition
- Repeated lockouts or loss of flame signal during operation
- Intermittent heating or hot water, often worse when the appliance is cold
- Pilot flame lights but the main burner will not fire
Before you order
- Check the appliance model against the fit list above
- Confirm the existing thermocouple connection type and thread match the kit
- Isolate the gas supply before any work
- Installation must be carried out by a Gas Safe registered engineer
Compliance
| Alternative numbers | 1690536 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| JOHNSON & STARLEY JANUS 3 WATER HEATER | — | — | — | |
| JOHNSON & STARLEY JANUS 3-30 HOT WATER CIRCULATOR | 53-416-06 | 53-416-06 | — | — |
| JOHNSON & STARLEY JOHNSON AND STARLEY JANUS 3 | — | — | — | |
| JOHNSON & STARLEY JOHNSON AND STARLEY JANUS3, JAN3/30 | — | — | — |
Documents & drawings
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