Ariston
Ariston Secondary Heat Exchanger 65103501
Ariston secondary heat exchanger, part number 65103501, for the ACO 35 HP MFFI UK combination boiler.
At a glance
- Part type: secondary heat exchanger
- Also known as 1571681
£177.97
£148.31 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 65103501 is a secondary heat exchanger used in Ariston combination boilers. It transfers heat from the primary circuit to the domestic hot water supply, so it is the component that heats the water drawn at the taps. It is listed for the Ariston ACO 35 HP MFFI UK appliance.
Signs this part needs replacing
- Hot water temperature fluctuating or running hot and cold at the tap
- Reduced domestic hot water flow rate compared with the cold supply
- Limescale or debris blocking the waterways, causing restricted flow
- Water weeping from the plate body or its connections
- Domestic hot water failing to reach temperature while the heating circuit works normally
Before you order
- Confirm the boiler model and GC number against the appliance data badge
- Check the part number on the existing component where it is legible
- Inspect the seals and connections, as these are often disturbed during removal
- Confirm whether the fault lies with the secondary heat exchanger rather than the diverter valve or primary circuit
Compliance
| Alternative numbers | 1571681 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ARISTON ACO 35 HP MFFI UK | 47-116-35 | 47-116-35 | — | — |
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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