Ariston
Ariston Thermostat DHW 997723
Ariston DHW thermostat, part number 997723, for use in the Challenger and SX 20 MFFI boiler ranges.
At a glance
- Also known as 1579236
£46.75
£38.96 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 Ariston 997723 is a domestic hot water (DHW) thermostat used in Ariston gas boilers. It monitors the temperature of the domestic hot water circuit and signals the appliance's control system to regulate heating of the hot water supply. It is a serviceable spare for the Challenger and SX 20 MFFI appliance families.
Signs this part needs replacing
- Domestic hot water runs consistently hot or cold regardless of the tap setting
- Hot water temperature fluctuates or cycles during draw-off
- Boiler fails to fire for a hot water demand, or fires and cuts out prematurely
- DHW temperature readings do not match the water delivered at the tap
- Fault codes or lockout conditions relating to the DHW circuit
Before you order
- Confirm the appliance model and GC number against the fitment list above
- Check the existing thermostat's part number and connections before removal
- Isolate the electrical supply and the gas and water supplies before working on the appliance
- Verify the boiler's edition or variant, as fitment differs between SX 20 MFFI versions
Compliance
| GC number | E03-820 |
|---|---|
| Barcode / EAN | 5411692244415 |
| Alternative numbers | 1579236 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ARISTON CHALLENGER 80E | 47-116-05 | 47-116-05 | — | — |
| ARISTON SX 20 MFFI CE LPG PROG. MEC EDITION 1 (JULY 2007) | — | — | — | |
| ARISTON SX 20 MFFI CE NG PROG. MEC EDITION 1 (JULY 2007) | 47-116-02 | 47-116-02 | — | — |
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.
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