How do I know if this pressure sensor is the one for my boiler?

Verify the reference S5720500 printed and ensure your model is on the list of compatible ones; also compare the connections with the original part.

The pressure sensor measures the water pressure of the circuit for the electronics.

Which models is it suitable for?

Part shared by various models (see Compatibility). If your model does not appear, send us a photo of the marking and we will confirm it.

Installation and recommendations

Check the connector and the gasket.

What does refurbished mean and what coverage does it have?

Part removed from a boiler out of service, inspected and tested. Includes 1-year warranty and 14-day return policy. Delivery within 2–4 working days in the EU.

What does fault code F9 mean on Saunier Duval?

Water pressure detector 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.

RefurbishedSaunier Duval Pressure sensors

Pressure Captor Saunier Duval Thema NOx F25 B 1 Ref. S5720500

Name: Pressure Sensor Saunier Duval Thema NOX F25 B 1 Ref. S5720500
Brand: Saunier Duval
SKU: CPCTNF25B1
Price: 20 EUR
Availability: InStock

20 €VAT includedIn stock · 1 unit

Pressure sensor: refurbished spare part that measures water pressure for the electronics. Useful if there is a pressure fault even though the pressure gauge reads correctly. Compatible with F 25 E, C 25 E, F 30 E (ref. S5720500). Includes a one-year warranty and delivery within 2–4 working days in the EU.

Consult via WhatsApp

Not sure if it's your part? Send us a photo of the screen printing via WhatsApp and we'll confirm compatibility before you purchase.

Delivery in 2–4 working days

1-year warranty

14-day return

Technical support

Key Data

Reference: S5720500
Brand: Saunier Duval
Type of part: Pressure sensors
Available units: 1 unit in stock
Status: Refurbished
Warranty: 1 year
Shipping: 2–4 working days (EU)
Return: 14 days

The same part (ref. S5720500) equips these models. Verified compatibility; check the reference before purchasing.

ThemaClassic

F 25 E
C 25 E
F 30 E
C 24 E1
F 24 E1

Isofast

F 35 E

Fault codes related to this part (not the entire boiler). They usually have more possible causes: first rule out electrodes, wiring/connections, and gas supply. Verified with ≥3 sources.

Code	What does it mean?	Cause and diagnosis (this part)
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.

How do I know if this pressure sensor is the one for my boiler?: Verify the reference S5720500 printed and ensure your model is on the list of compatible ones; also compare the connections with the original part.
What is it used for?: The pressure sensor measures the water pressure of the circuit for the electronics.
Pressure fault even though the pressure gauge reads correctly?: The sensor is not transmitting the correct pressure to the PCB.
Which models is it suitable for?: Part shared by various models (see Compatibility). If your model does not appear, send us a photo of the marking and we will confirm it.
Installation and recommendations: Check the connector and the gasket.
What does refurbished mean and what coverage does it have?: Part removed from a boiler out of service, inspected and tested. Includes 1-year warranty and 14-day return policy. Delivery within 2–4 working days in the EU.

Pressure Captor Saunier Duval Thema NOx F25 B 1 Ref. S5720500

Key Data

ThemaClassic

Isofast

Related Spare Parts Boiler Thema NOx F25 B 1