Ariston
Ariston Contact NTC Probe 990405
Contact NTC probe, Ariston part 990405, for use in a range of Ariston and Chaffoteaux gas boilers.
At a glance
- Part type: contact NTC probe
- Also known as CONTACT-NTC-PROBE, 1575966
£21.07
£17.56 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 990405 is a contact NTC probe used across a range of Ariston and Chaffoteaux gas boilers. The probe senses temperature at its contact point and feeds that reading back to the boiler control board so the appliance can regulate heating and domestic hot water. It is classified as a gas boiler spare.
Signs this part needs replacing
- Boiler reports a temperature sensor or NTC fault code
- Heating flow temperature fluctuates or drifts away from the setpoint
- Boiler short-cycles or locks out during a heating or hot water demand
- Domestic hot water temperature is inconsistent
- Boiler modulates erratically because the control board is receiving unstable readings
Before you order
- Confirm your appliance model against the fitment list above
- Where a "FROM Serial No" threshold is shown, check your appliance serial number falls within range
- Where a GC number is listed, check it against the data badge on your appliance
- Confirm the part number 990405 matches the probe being replaced
Compliance
| Barcode / EAN | 5411692443849 |
|---|---|
| Alternative numbers | CONTACT-NTC-PROBE, 1575966 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ARISTON ACO 27 MFFI GPL | 47-116-34 | 47-116-34 | — | — |
| ARISTON ACO 27 MFFI MET | 47-116-34 | 47-116-34 | — | — |
| ARISTON ACO 27 RFFI SYSTEM GPL | 41-116-09 | 41-116-09 | — | — |
| ARISTON ACO 27 RFFI SYSTEM MET | 41-116-09 | 41-116-09 | — | — |
| ARISTON ACO 32 MFFI GPL | 47-116-35 | 47-116-35 | — | — |
| ARISTON ACO 32 MFFI MET | 47-116-35 | 47-116-35 | — | — |
| ARISTON ACO 32 RFFI SYSTEM GPL | 41-116-10 | 41-116-10 | — | — |
| ARISTON ACO 32 RFFI SYSTEM MET | 41-116-10 | 41-116-10 | — | — |
| ARISTON ACO TANK 120 LT INOX (UK) EDITION 1 (FEB 2006) | — | — | — | |
| ARISTON ARISTON ACO 27 MFFI | — | — | — |
Showing 10 of 51 compatible appliances.
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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