Pressure Sensor Saunier Duval Isomax F 28 E2 Ref. S5720500
When you open the tap or turn on the heating, the pressure sensor Saunier Duval Isomax F 28 E2 measures the water circuit pressure and sends the information to the boiler's PCB. If this part fails, you may notice incorrect readings and lockouts due to a false lack of pressure, which can affect the operation of your system. This sensor is compatible with several models, including those from the ThemaClassic range such as the F 25 E and the F 30 E, among others. It is advisable to replace it if you experience pressure issues or if the fault code F9 appears.
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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 pressure switch of the boiler is failing or showing an error without a clear mechanical reason.
Cause: The sensor sends an incorrect signal and the PCB interprets it as a pressure problem.
Check for any leaks or air in the circuit before assuming that the problem is with the sensor.
- 02
The pressure displayed by the boiler remains fixed or shows zero even when the circuit is charged.
Cause: The sensor has stopped sending the signal proportional to the actual water pressure.
Fill the circuit with the charging key and check if the number on the screen moves; if it doesn't change, the signal is not reaching.
- 03
The boiler does not start or cuts off the ignition attempt almost immediately.
Cause: Without a correct pressure reading, the electronics do not allow ignition for safety reasons.
Check the 4-pin connector of the sensor: a poor connection can cause the same fault as a faulty sensor.
- 04
The pressure reading fluctuates strangely, rising and falling on its own on the display.
Cause: A loose connection or an internal fault in the sensor causes an unstable signal instead of a constant reading.
Carefully move the wiring of the sensor while watching the screen; if the value changes when touching the cable, check the connection.
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
- 5 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.
- Printed code
- PSN0001 B
- Pressure range
- 0-4.5 bar
- Output
- 1-4 Vdc (proportional to pressure)
- Power supply
- 5 Vdc
- Pin assignment
- 1: 0V | 2: +Vcc | 3: NC | 4: OUT
- Protection class
- Class III
- Marked
- CE
- Place of manufacture
- Made in France
- Batch/date
- 22/01
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 fault indicates that the pressure sensor needs to be replaced on the Saunier Duval Isomax F 28 E2 Ref. S5720500?
What output signal does this pressure sensor Ref. S5720500 provide?
Is this pressure switch compatible with other Saunier Duval boilers?
What pressure range does this sensor from Isomax measure?
How many models are compatible with the pressure sensor Saunier Duval Isomax F 28 E2 Ref. S5720500?
What fault code is documented for this pressure sensor?
Spare parts related to Saunier Duval ThemaClassic
