Water Pressure Sensor Saunier Duval Isofast C 28 E A Ref. S57205
RefurbishedSaunier DuvalPressure sensors

Water Pressure Sensor Saunier Duval Isofast C 28 E A Ref. S57205

20 €VAT includedIn stock · 5 units

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 C24EV, C28E, C28E1 (ref. S57205). Includes a one-year warranty and delivery within 2–4 working days in the EU.

1
Consult via WhatsApp
Delivery in 2–4 working days
1-year warranty
14-day return
Technical support

Key Data

Reference
S57205
Brand
Saunier Duval
Type of part
Pressure sensors
Available units
5 units in stock
Status
Refurbished
Warranty
1 year
Shipping
2–4 working days (EU)
Return
14 days

The same part (ref. S57205) equips these models. Verified compatibility; check the reference before purchasing.

Isofast

  • C24EV
  • C28E
  • C28E1
  • C35E
  • C35E1
  • F24E
  • F28E
  • F28E1
  • F35E
  • F35E1

Isomax

  • C28E
  • C28E2
  • F28E
  • F28E2
  • Condens F35E

Isotwin

  • C24E
  • F24E
  • F28E
  • Condens F30-A

Themaplus

  • C24E
  • F24E
  • F25E
  • F30E

Themafast

  • C24E
  • F24E
  • Condens F24E
  • Condens F30E

Themaclassic

  • F24E
  • F25E
  • C24E
  • FAS24E
  • FAS25E

Themacondens

  • F24E
  • F25
  • FAS25

Thematek

  • C18E
  • C24E
  • F24E

Thema

  • C24E
  • Condens F25

Semia

  • Condens F25

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.

CodeWhat does it mean?Cause and diagnosis (this part)
F9Water pressure sensor fault.The S57205 sensor does not deliver a valid signal (loose connector, short circuit, or obstructed hydraulic connection) and the PCB does not 'see' pressure; check wiring and pressure reading in diagnostic/menu and verify that the signal changes when pressurizing.
F.73Water pressure sensor signal out of range (too low).Interruption/short circuit of the sensor or ground in the cable; check power supply and sensor signal, continuity of the harness, and ensure the sensor port is not blocked.
F.74Water pressure sensor signal out of range (usually too high).Short circuit at 5/24 V or internal fault of the sensor; measure the sensor output and check if it remains fixed at high; inspect wiring and clean the orifice, replacing the sensor if it does not recover.
F.75No increase in pressure detected when the pump starts (pressure sensor and/or pump).The sensor does not detect the pressure 'spike' due to a faulty sensor or blocked intake (first rule out air/lack of water/pump); check the pressure reading during start-up in service mode and the continuity/power supply of the sensor.
How do I know if this pressure sensor is the one for my boiler?
Verify the reference S57205 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.

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