Saunier Duval Themafast F 25 E Hydraulic Component - Ref. S1024900
The hydraulic component Saunier Duval Themafast F 25 E is essential in the boiler, as it is responsible for conducting and distributing water among the different circuits. When this part fails, you may notice leaks, loss of pressure, or issues with hot water production. This component is compatible with several models, including the Themafast F 30 E, the Isofast F 30 E, and the Thema NOx F 25, among others. A technician must confirm through diagnosis whether it needs to be replaced when the mentioned symptoms are present to avoid malfunctioning in the boiler.
- Type of part
- Hydraulic units
- Status
- Refurbished
- Catalogue reference
- S1024900
- Warranty
- 1 year
Saunier Duval boilers compatible with reference S1024900
Hydraulic group with reference S1024900. Five confirmed compatibilities: F 25 E and F 30 E.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval F 25 E | Themafast | Contrasted |
| Saunier Duval F 30 E | Themafast | Contrasted |
| Saunier Duval F 30 E | Isofast | Contrasted |
| Saunier Duval F 35 E | Isofast | Contrasted |
| Saunier Duval F 25 | NOx 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. S1024900 is the part for your boiler
The part reference, model, and equipment revision must be verified against the manufacturer's documentation.
- Find the reference printed on the installed part and check whether it matches the catalogue reference S1024900. 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 that require diagnosis in the hydraulic group S1024900
The hydraulic group includes the valve, the by-pass, and the water connections. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
Moisture or a specific drip appears in the section of the water circuit where this part is mounted.
Cause: The gaskets of this component can develop leaks over time.
Locate precisely where the water is coming from: dry everything and observe with the boiler running for a few minutes.
- 02
The circuit is losing pressure and needs to be refilled more often than usual.
Cause: A small leak at any joint in the circuit, including this part, causes a gradual drop in pressure.
Before replacing this part, rule out the expansion vessel and the filling valve, which can also cause this symptom.
- 03
The radiators take longer to heat up or the hot water comes out at a lower temperature.
Cause: If the internal passage of this part narrows due to scale, the flow that circulates is reduced.
Check the water hardness of the installation and if sludge comes out when bleeding, before attributing it solely to this part.
- 04
Lime or corrosion residues are visible in the area where this component connects.
Cause: The deposits of lime and rust indicate a point where there has been moisture, even if it is not currently dripping.
Clean and dry the area and monitor it for a few days of normal use to confirm if the moisture reappears.
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.
Data sheet for the Saunier Duval hydraulic group S1024900
- Catalogue reference
- S1024900
- Uniclima internal SKU
- PZF25MOD
- Brand
- Saunier Duval
- Type of part
- Hydraulic units
- Units in stock
- 4 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- Return
- 14 days
Part data and available documentation
Contrast the label codes, PCB, and revision with the installed part; they are not necessarily equivalent references.
- Reference
- S1024900
Frequently asked questions about the hydraulic group S1024900
What is the reference for this hydraulic component of the Themafast F 25 E?
Is this hydraulic component compatible with the Condens F 30 E boiler?
