Pressure Sensor Code 0020016532 - Thema, Isofast, Condens F and Other Boilers
When you open the hot water tap or turn on the heating, the pressure sensor 0020016532 of Thema, Isofast, Condens F, and other boilers is responsible for measuring the circuit pressure and sending the information to the control board. If this component fails, you will notice incorrect readings and may experience lockouts due to a false lack of pressure, with fault code F9 possibly appearing. This sensor is compatible with models such as ThemaClassic F 25 E, C 25 E, F 30 E, C 24 E1, F 24 E1, and Isofast F 35 E, among others. It should be replaced when these symptoms are detected to avoid issues with the boiler's operation.
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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 locks out with a pressure fault warning even though the circuit is properly filled.
Cause: The sensor sends an incorrect pressure signal to the PCB, and the control unit shuts down for safety.
Compare the reading on the display with the mechanical manometer of the boiler before changing the sensor.
- 02
The boiler stops on its own during operation without any visible leaks or pressure loss.
Cause: An unstable electrical signal from the sensor causes the control board to believe that the pressure suddenly rises or falls.
Check the connector of the sensor and the wiring up to the PCB for any moisture or a loose terminal.
- 03
You have replaced the pressure with the filling key and the pressure warning does not disappear.
Cause: The sensor keeps sending the same erroneous value regardless of what you do in the circuit.
Note the value indicated by the manometer after bleeding and filling, and compare it with the one reported by the electronics.
- 04
The boiler makes several attempts to start but does not ignite, always with the same pressure warning.
Cause: The PCB does not allow ignition until it receives a stable pressure reading within range.
Bleed the air from the radiators and check that there is no air left in the circuit before replacing 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
- 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
- 0020016532
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
What code is printed on this pressure sensor code 0020016532?
Is the reference S5720500 the same part as this collector code 0020016532?
Which boilers are compatible with this pressure switch?
What is the function of the pressure switch in the boiler?
When should this pressure switch be replaced?
What is the reference for this pressure sensor?
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