Ariston
Ariston Overheat Thermostat 65109178
Ariston overheat thermostat 65109178 for NUOS heat pump water heaters, providing thermal cut-out protection.
At a glance
- Also known as 1593264
£19.76
£16.47 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 65109178 is an overheat thermostat used in Ariston NUOS heat pump water heaters. It acts as a thermal safety cut-out, interrupting the heating circuit if the stored water temperature exceeds the safe operating limit. It is a service component for the NUOS range.
Signs this part needs replacing
- The appliance locks out and will not resume heating after a high-temperature trip
- The overheat cut-out trips repeatedly with no obvious cause elsewhere in the system
- No continuity across the thermostat terminals when tested
- The thermostat fails to reset after the unit has cooled down
- Heating stops before the cylinder reaches its set temperature
Before you order
- Confirm the appliance model from the data badge, as the NUOS range uses more than one configuration
- Check the fault is the thermostat itself and not a control or sensor fault causing the trip
- Isolate the power supply before removing or testing the existing thermostat
- Compare the part number on the existing component against 65109178
Compliance
| Alternative numbers | 1593264 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ARISTON NUOS 100 HEAT PUMP | — | — | — | |
| ARISTON NUOS 100 HP HEAT PUMP | — | — | — | |
| ARISTON NUOS 120 HEAT PUMP | — | — | — | |
| ARISTON NUOS 80 HEAT PUMP | — | — | — | |
| ARISTON NUOS 80 HP HEAT PUMP | — | — | — |
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.
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