Pressure Sensor Saunier Duval Isofast F 28 E PSA0001 C

Saunier Duval boilers compatible with reference PSN0001

Pressure sensor with reference PSN0001. 24 verified compatibilities: Isofast C 28 E and Isofast C 28 E1.

Proven compatibility

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. PSN0001 is the part for your boiler

The part reference, model, and equipment revision must be verified against the manufacturer's documentation.

1. Find the reference printed on the installed part and check whether it matches the catalogue reference PSN0001. If it is not visible, do not identify the part from its shape alone.
2. Check the full boiler model on its data plate and look for it in the model associations on this page.
3. Compare the connections and physical body with the original part before installation.
4. If anything is unclear, send us a photo of the marking via WhatsApp before placing your order.

Symptoms that require diagnosis in the pressure switch PSN0001

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 error or the pressure symbol is flashing, even though the boiler's manometer shows normal pressure.

  Cause: The sensor sends an electrical signal that does not correspond to the actual pressure, and the control unit interprets it as a pressure fault.

  Compare the digital reading with the mechanical manometer of the boiler before declaring the sensor faulty.

• 02

  The boiler locks out as soon as it starts, as if it doesn't have enough pressure, even though the circuit is full.

  Cause: Without a reliable signal from the sensor, the control board does not confirm the minimum pressure and cuts off the ignition for safety.

  Bleed the air from the circuit and check for any visible leaks before replacing the sensor.

• 03

  The pressure reading on the display remains fixed, neither increasing nor decreasing, even when water is added or removed from the circuit.

  Cause: The internal element of the sensor stops translating hydraulic pressure into an electrical signal and gets "frozen" at a value.

  Tighten the connector of the sensor and check the wiring to the PCB; a loose connection produces the same effect.

• 04

  There is moisture, limescale buildup, or dripping in the area where the sensor is screwed in.

  Cause: The gasket or body of the sensor loses tightness with use and allows water from the primary circuit to pass through.

  Dry the area, turn on the boiler, and monitor for a few minutes to confirm that the leak is coming from there and not from a nearby fitting.

Fault codes Saunier Duval that require diagnosis

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 PSN0001

Catalogue reference

PSN0001

Uniclima internal SKU

SPSDIF28E

Brand

Saunier Duval

Type of part

Pressure sensors

Units in stock

6 units

Status

Refurbished

Warranty

1 year

Shipping

Delivery time shown at checkout

Return

14 days

Part data and available documentation

Contrast the label codes, PCB, and revision with the installed part; they are not necessarily equivalent references.

Pressure range

0-4.5 bar

Power supply

5 Vdc

Electrical protection class

Class III

Pinout

1: 0V / 2: +Vcc / 3: NC / 4: OUT

Code printed on the label

PSA0001 C

Batch

105227B

Manufacturing date/week

47/99 (week/year)

Place of manufacture

Made in France