Bithermal Heat Exchanger Ariston AS 24 FF Ref. 65106300
If you notice that the water is lukewarm or experience temperature fluctuations in your heating system, you may need a new Ariston AS 24 FF dual heat exchanger. This part is responsible for simultaneously heating the heating circuit and the domestic hot water. When it fails, it can cause an internal leak, affecting the water temperature. It is compatible with several models, such as the AS 24 FF GPL, AS 24 FF NG, and EGIS 24 FF, among others. It is recommended to replace it upon noticing these symptoms to restore comfort in your home.
Ariston boilers compatible with reference 65106300
Bithermal heat exchanger with reference 65106300. Six confirmed compatibilities: 24 FF and 24 FF GPL.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Ariston 24 FF | AS | Contrasted |
| Ariston 24 FF LPG | AS | Contrasted |
| Ariston 24 FF NG | AS | Contrasted |
| Ariston IN 24 | AS | Contrasted |
| Ariston 24 FF | AS-BIK | Contrasted |
| Ariston 24 FF | EGIS | Contrasted |
Can't see your model or have questions? The printed reference takes precedence. How to check it · Send us a photo via WhatsApp.
How to check if ref. 65106300 is the part for your boiler
What determines it is not the boiler model, but the reference printed on the part you already have installed.
- Find the reference printed on the installed part and check whether it matches the catalogue reference 65106300. If it is not visible, do not identify the part from its shape alone.
- Check the full boiler model on its data plate and look for it in the model associations on this page.
- Compare the connections and physical body with the original part before installation.
- If anything is unclear, send us a photo of the marking via WhatsApp before placing your order.
Symptoms and faults that the bivalent heat exchanger 65106300 solves.
The bivalent heat exchanger transfers heat to heating and domestic hot water. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
The domestic hot water comes out lukewarm or takes a long time to heat up, even though the heating works normally.
Cause: Limescale accumulates in the fine channels of the bithermal heat exchanger and reduces the heat transfer to the domestic hot water.
Open a hot water tap and time how long it takes to heat up; if it improves after a specific cleaning, the problem is limescale, not necessarily the part.
- 02
A bubbling or knocking sound is heard inside the boiler right when domestic hot water is requested.
Cause: The limescale buildup in the bithermic heat exchanger causes the water to boil at specific points and produces that characteristic noise.
Check if the noise always coincides with the start of the domestic hot water and if the circuit pressure is within a normal range before deciding on the replacement.
- 03
The heating circuit is losing pressure without any visible leaks outside the boiler.
Cause: An internal crack in the bithermic heat exchanger connects the two circuits, causing the heating water to gradually leak into the domestic hot water system.
Keep an eye on whether you need to refill pressure more frequently than usual and rule out external leaks before pointing to the heat exchanger.
- 04
The domestic hot water sometimes comes out with a different color or smell than usual.
Cause: When there is a passage between circuits due to an internal crack, the domestic hot water mixes with the heating circuit water.
Compare the appearance and smell of the hot water from various taps in the house before concluding that the heat exchanger is perforated.
These symptoms can have more than one cause. If your boiler displays a fault code, send it to us via WhatsApp along with a photo of the labeling, and we'll tell you if this is the part.
Datasheet for the Ariston 65106300 bithermal heat exchanger
- Catalogue reference
- 65106300
- Brand
- Ariston
- Type of part
- Bithermic heat exchanger
- Units in stock
- 6 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- Return
- 14 days
Frequently asked questions about the bivalent heat exchanger 65106300
Is this heat exchanger suitable for an AS-BIK 24 FF or an EGIS 24 FF?
What does the bivalent heat exchanger of the AS IN 24 look like?
What is the function of this bivalent heat exchanger in the AS 24 FF NG?
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