
Flow meter Saunier Duval Isofast C 35 E1 Ref. S5720200
Flow meter or Hall effect flow sensor, black plastic part with green electrical connector, for Saunier Duval Isofast boilers and compatible models from the Vaillant group. It detects the flow of water to activate the ignition and the production of domestic hot water. It is replaced when the boiler does not detect flow or does not heat the domestic hot water. The code engraved on the part (0001035190000) corresponds to the commercial reference S5720200.
VAT included
Consult via WhatsAppSaunier Duval boilers compatible with reference S5720200
Flow meter with reference S5720200. 33 confirmed compatibilities: ThemaClassic C24E and ThemaClassic C25E.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval ThemaClassic C24E | ThemaClassic | Contrasted |
| Saunier Duval ThemaClassic C25E | ThemaClassic | Contrasted |
| Saunier Duval ThemaClassic F24E | ThemaClassic | Contrasted |
| Saunier Duval ThemaClassic F25E | ThemaClassic | Contrasted |
| Saunier Duval Themafast C24E | Themafast | Contrasted |
| Saunier Duval Themafast C25E | Themafast | Contrasted |
| Saunier Duval Themafast C28E | Themafast | Contrasted |
| Saunier Duval Themafast Condens F24E | Themafast | Contrasted |
| Saunier Duval Themafast Condens F25 | Themafast | Contrasted |
| Saunier Duval Thematek C24E | Thematek | Contrasted |
| Saunier Duval Thematek F24E | Thematek | Contrasted |
| Saunier Duval Thematek S C24E | Thematek | Contrasted |
| Saunier Duval Thematek S F24E | Thematek | Contrasted |
| Saunier Duval Isofast C28E | Isofast | Contrasted |
| Saunier Duval Isofast C35E | Isofast | Contrasted |
| Saunier Duval Isofast F28E | Isofast | Contrasted |
| Saunier Duval Isofast Condens F30E | Isofast | Contrasted |
| Saunier Duval Isofast Condens F35E | Isofast | Contrasted |
| Saunier Duval Isomax C28E | Isomax | Contrasted |
| Saunier Duval Isomax F28E | Isomax | Contrasted |
| Saunier Duval Isomax Condens F35E | Isomax | Contrasted |
| Saunier Duval Isotwin C24EA | Isotwin | Contrasted |
| Saunier Duval Isotwin C28EA | Isotwin | Contrasted |
| Saunier Duval Isotwin F24E | Isotwin | Contrasted |
| Saunier Duval Isotwin F28EA | Isotwin | Contrasted |
| Saunier Duval Opalia C16E | Opalia | Contrasted |
| Saunier Duval Opalia F11E | Opalia | Contrasted |
| Saunier Duval Opalia F14E | Opalia | Contrasted |
| Saunier Duval Opalia F17E | Opalia | Contrasted |
| Saunier Duval Thema NOx F25 | Thema Nox / Thema Condens | Contrasted |
| Saunier Duval Thema Condens F24E | Thema Nox / Thema Condens | Contrasted |
| Saunier Duval Thema Condens F25 | Thema Nox / Thema Condens | Contrasted |
| Saunier Duval Semia F24 | Semia | 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. S5720200 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 S5720200. 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 flow meter S5720200 resolves.
The flow meter detects the passage of water to activate the domestic hot water. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
The boiler does not ignite to provide hot water, but it works well for heating.
Cause: The flow meter does not send the rotation signal, so the PCB does not detect the demand for domestic hot water and the burner does not start.
Open the tap to the maximum for a moment: if the boiler ignites, the problem may be insufficient flow, not the sensor.
- 02
The hot water is interrupted while you shower or wash dishes.
Cause: The turbine may temporarily lose traction due to scale or debris, causing the sensor to send irregular pulses.
Check the cold water inlet filter of the boiler: if it is dirty, it can reduce the flow rate and cause interruptions in the domestic hot water.
- 03
A fault code related to the flow sensor or flow meter appears on the screen.
Cause: The electronics detect an unexpected signal from the sensor and display that specific warning.
Note the exact code that appears on the display: it will help you confirm in the manual whether it refers to the sensor or another cause before purchasing the part.
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 S5720200 flow meter
- Catalogue reference
- S5720200
- Brand
- Saunier Duval
- Type of part
- Flow detectors
- Units in stock
- 7 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- Return
- 14 days
Data read on the part and in the manufacturer's documentation
What we have not been able to verify does not appear here.
- Code engraved on the part
- 0001035190000
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Saunier Duval Thematek S F24E Manual (PDF)Document © Saunier Duval, provided as a technical reference.












