Plate Heat Exchanger Boiler Thematek SF 24 E - Ref. S1005800
When you open the hot water tap, the plate heat exchanger of the Thematek SF 24 E boiler - Ref. S1005800 is responsible for transferring heat from the primary circuit to the domestic hot water instantly. If this part fails, you will notice that the water comes out lukewarm or with fluctuating temperature, and the flow of domestic hot water may also decrease. This heat exchanger is compatible with several models, such as the Thematek S C 24 E and the Themaclassic C 25 E, among others. It is recommended to replace it when these symptoms of lack of heat or low pressure in the hot water occur.
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Consult via WhatsAppSaunier Duval boilers compatible with reference S1005800
Plate heat exchanger with reference S1005800. 12 verified compatibilities: Thematek S C 24 E and Thematek S F 24 E.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval Thematek S C 24 E | Thematek | Contrasted |
| Saunier Duval Thematek S F 24 E | Thematek | Contrasted |
| Saunier Duval Themaclassic C 24 E | Themaclassic | Contrasted |
| Saunier Duval Themaclassic C 25 E | Themaclassic | Contrasted |
| Saunier Duval Themaclassic F 24 E | Themaclassic | Contrasted |
| Saunier Duval Themaclassic F 25 E | Themaclassic | Contrasted |
| Saunier Duval Semia Tek C 24 | Semia | Contrasted |
| Saunier Duval Semia Tek F 24 | Semia | Contrasted |
| Saunier Duval Semia Condens F25 | Semia | Contrasted |
| Saunier Duval Thema F 25 E STL | Thema | Contrasted |
| Saunier Duval Thema NOx F 25-B | Thema | Contrasted |
| Saunier Duval Thema Condens F25 | Thema | 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. S1005800 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 S1005800. 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 S1005800 plate heat exchanger resolves.
The plate heat exchanger transfers heat to the domestic hot water. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
The hot water comes out lukewarm or loses temperature if you open another tap at the same time.
Cause: The plate heat exchanger has scale buildup and does not transfer heat well, which reduces the flow of domestic hot water (DHW).
Check the flow of hot water with one tap open and then with two; if it drops significantly, suspect the heat exchanger before replacing it.
- 02
The pressure in the heating circuit rises on its own when you request hot water, even though it is normal when cold.
Cause: An internal perforation of the heat exchanger allows water from the network to enter the closed heating circuit.
Check the pressure gauge when cold and again right after using the domestic hot water; if it rises repeatedly, it's not just the expansion vessel.
- 03
The heating circuit needs to be filled every few weeks without any visible leaks outside.
Cause: The heat exchanger has a microcrack that slowly allows water to escape into the primary circuit.
Check the gaskets, bleed valves, and safety valve before assuming that the leak comes from the heat exchanger.
- 04
The boiler turns on and off repeatedly when someone is taking a shower, as if it loses its connection.
Cause: The limescale embedded in the heat exchanger narrows the passage and causes the flow meter to detect variations, leading the boiler to poorly modulate the domestic hot water.
Clean or check the cold water inlet filter, which usually clogs before the heat exchanger itself.
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.
Saunier Duval S1005800 Plate Heat Exchanger Datasheet
- Catalogue reference
- S1005800
- Brand
- Saunier Duval
- Type of part
- Plate heat exchanger
- Units in stock
- 1 unit
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- 1-2 business days
- Return
- 14 days
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Saunier Duval Thematek S F 24 E Manual (PDF)Document © Saunier Duval, provided as a technical reference.
Frequently asked questions about the S1005800 plate heat exchanger.
Does this heat exchanger work for a Sémia Tek F24 or only for the C24?
Does this plate heat exchanger also fit in a Themaclassic C24E?
Spare parts related to Saunier Duval Themaclassic
