Saunier Duval Pressure Sensor - Code 0020016532
If you notice that your boiler shows the fault code F9, it is possible that the pressure sensor is failing. The Saunier Duval pressure sensor - Cod. 0020016532 measures the pressure of the water circuit and sends the information to the control board. When this component does not function properly, it can cause incorrect readings and lockouts due to false low pressure. It is compatible with boilers from the ThemaClassic range, such as the F 25 E model, among others. It is recommended to replace it if you experience pressure issues or operational errors.
Saunier 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 digital manometer shows a fixed pressure and does not decrease, even when draining water from the circuit.
Cause: A blocked sensor in a fixed reading continues to send the same value regardless of what happens in the actual circuit.
Open the radiator bleed valve and check if the digital value changes; if it stays the same, the sensor is not reading.
- 02
The boiler shows a pressure fault when starting, before requesting heating or domestic hot water.
Cause: The PCB checks the signal from the sensor upon starting and locks out if it does not receive a valid reading.
Measure the pressure with a mechanical manometer before turning it on; if it is within range and the fault persists, the sensor is the problem.
- 03
The pressure fault disappears temporarily and then returns, without having touched the circuit.
Cause: This indicates a sensor with a loose internal connection that makes intermittent contact.
Gently tap the area of the sensor with the boiler on and see if the fault changes; this helps to confirm an intermittent fault.
- 04
The boiler does not start even though the circuit is full and there are no visible leaks.
Cause: Without a proper signal from the sensor, the control board thinks that there is a lack of pressure and does not allow ignition.
Check for any water leaks dripping from the safety valve, as they could lower the actual pressure and be mistaken for a fault in the sensor.
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
- 0 units
- 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.
- Code on label
- 0020016532
- Brand on label
- Letter 'A'
Frequently asked questions about the pressure sensor S5720500
Is this Saunier Duval CPTNF30B2 pressure sensor compatible with my Thema Classic boiler?
When should I replace the pressure switch in my boiler?
How many models are compatible with this pressure switch?
What fault code is documented for this part?
Can I find the complete batch number for this part?
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