Saunier Duval Pressure Sensor Ref. 0020016532
Measure the pressure of the water circuit and send the information to the control board. If the pressure sensor of your Saunier Duval boiler fails, you may notice incorrect readings and lockouts due to a false lack of pressure, which may trigger the fault code F9. This sensor is compatible with several models from the ThemaClassic range, such as the F 25 E, C 25 E, F 30 E, C 24 E1, and F 24 E1, as well as the F 35 E model from the Isofast range. It is advisable to replace it when you experience pressure issues or lockouts in the operation of the boiler.
VAT included
Consult via WhatsAppSaunier Duval boilers compatible with reference S5720500
Pressure sensor with reference S5720500. Six confirmed compatibilities: F 25 E and C 25 E.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval F 25 E | ThemaClassic | Contrasted |
| Saunier Duval C 25 E | ThemaClassic | Contrasted |
| Saunier Duval F 30 E | ThemaClassic | Contrasted |
| Saunier Duval C 24 E1 | ThemaClassic | Contrasted |
| Saunier Duval F 24 E1 | ThemaClassic | Contrasted |
| Saunier Duval F 35 E | Isofast | 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. S5720500 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 S5720500. 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 pressure sensor S5720500 resolves.
The pressure sensor measures the water pressure for the electronics. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
The boiler does not start and the display shows that there is a lack of pressure, even though the circuit is full.
Cause: The sensor sends a false low pressure reading and the PCB cuts off the ignition for safety.
Measure the pressure with a needle manometer; if it does not match the digital reading, the problem is the sensor.
- 02
The pressure displayed on the boiler fluctuates on its own without touching the filling tap.
Cause: A sensor with a damaged membrane or internal circuit generates an unstable signal to the PCB.
Observe the value on the screen for a few minutes with the boiler off; if it fluctuates without reason, it is not a filling issue.
- 03
The boiler intermittently locks out: sometimes it starts and sometimes it doesn't.
Cause: A sensor with an internal contact fault gives inconsistent signals depending on the moment.
Try to start the boiler several times in a row and note whether the fault is constant or intermittent; this helps to distinguish the fault of the sensor from an installation problem.
- 04
The pressure fault warning persists even after bleeding the air and refilling the circuit.
Cause: If the PCB does not receive a coherent signal from the sensor, it will continue to block even if the actual pressure is correct.
Check the condition of the electrical connector of the sensor (oxidation, moisture, bent pins) before considering it faulty.
Fault codes from Saunier Duval that this spare part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F9 | Water pressure sensor fault. | The pressure transducer S5720500 delivers an absent/out-of-range signal or does not reach the PCB, the electronics interpret an abnormal pressure and lock with F9; verify by measuring the sensor signal and the harness/wiring and comparing with an external manometer. |
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 Saunier Duval pressure sensor S5720500
- Catalogue reference
- S5720500
- Brand
- Saunier Duval
- Type of part
- Pressure sensors
- Units in stock
- 1 unit
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- 1-2 business days
- 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.
- Part code (label)
- 0020016532
- Batch brand
- lot: 150920 A
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Saunier Duval F 25 E Manual (PDF)Document © Saunier Duval, provided as a technical reference.
Frequently asked questions about the pressure sensor S5720500
Is this pressure sensor Saunier Duval Ref. 0020016532 compatible with my boiler?
What fault can be resolved by replacing the pressure switch?
How many models are compatible with this pressure switch?
What fault code is associated with this pressure sensor?
What is the reference for this pressure sensor?
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