Hamworthy
Hamworthy Ionisation Probe 573406123
Hamworthy ionisation probe, part 573406123, for Cranborne THI boilers, used to sense flame presence at the burner.
At a glance
- Appliance family: Cranborne THI
- Also known as 2063380
£40.61
£33.84 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 Hamworthy 573406123 is an ionisation probe (SHORT20) used in Cranborne THI boilers. It sits in the burner flame path and provides the flame-sensing signal that the boiler controls use to confirm combustion and allow the burner to run. It is a serviceable electrode component within the boiler's ignition and flame supervision circuit.
Signs this part needs replacing
- Boiler fires then locks out shortly after ignition, with no sustained flame signal.
- Repeated lockouts on start-up despite a visible spark and gas supply at the burner.
- Intermittent shutdowns during a call for heat that clear on reset.
- Flame failure or ignition lockout fault codes shown at the controls.
- Visible damage to the probe tip, ceramic insulator or electrode stem.
Before you order
- Confirm the boiler model is a Cranborne THI and check the existing probe against the SHORT20 variant.
- Read the part number from the existing probe or the manufacturer's parts list before ordering.
- Inspect the probe lead and its connection to the control board, as poor continuity can mimic a failed probe.
- Check the probe tip and ceramic for cracking, contamination or distortion.
Compliance
| Alternative numbers | 2063380 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| HAMWORTHY HAMWORTHY SPARE PARTS | — | — | — |
Documents & drawings
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