Pressure Sensor Saunier Duval — Isofast, Isomax, ThemaCondens, ThemaFast, Themaclassic — Code 0020016532
The pressure sensor from Saunier Duval is a sensor that measures the water circuit pressure in the boilers Isofast, Isomax, ThemaCondens, ThemaFast, and Themaclassic. Its function is to send the pressure reading to the control board, allowing for proper system operation. When it fails, the user may notice incorrect readings and lockouts due to a false lack of pressure, and the fault code F9 may appear. This sensor is compatible with models such as F 25 E, C 25 E, F 30 E, C 24 E1, and F 24 E1, among others. It should be replaced when these symptoms or faults are detected.
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 display shows a pressure different from that of the boiler's analog manometer.
Cause: The pressure sensor sends an incorrect signal to the control board, affecting the digital reading.
Compare the digital reading with the needle manometer of the boiler when cold; if there is a significant difference, the sensor may be faulty.
- 02
The boiler is locking out due to low pressure, even though you have recently bled and refilled the circuit.
Cause: The sensor indicates a pressure lower than the actual one, which causes a safety shutdown.
Bleed the air from the radiators and check on the analog manometer that the actual pressure is within the appropriate range before changing the sensor.
- 03
The boiler turns on and off by itself, intermittently displaying a pressure fault without a clear pattern.
Cause: A poor connection in the connector or in the wiring of the sensor generates erratic readings that the control board interprets as a fault.
Make sure that the connector of the sensor is properly tightened and free of corrosion before replacing the part.
- 04
The pressure reading on the display fluctuates sharply without you having manipulated the filling valve or any visible leaks.
Cause: A faulty sensor can send inaccurate signals that do not reflect real changes in the circuit.
Record the reading at different times of the day; if it varies sharply without relation to the use of the boiler, consider that the problem may be with 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
- 4 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.
- Part code (label marking)
- 0020016532
- Manufacturing batch (fragment, cropped by the frame)
- LOT: 080679... (the end of the number is out of the photo)
- The code 0020016532 is identical to the one read on the CPTCF24 sheet; it could be the same physical component, although it is sold for different boiler lists.
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 switch suitable for the Saunier Duval Isofast F28E?
When should this sensor be replaced in a Saunier Duval ThemaFast C25?
Does the code 0020016532 of this part match that of another entry in the catalog?
Spare parts related to Saunier Duval ThemaClassic
