Main PCB Saunier Duval Thema C 23 E Ref. 05741000

Saunier Duval boilers compatible with reference 05741000

PCB with reference 05741000. Eight confirmed compatibilities: C 23 E and F 23 E.

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. 05741000 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.

1. Find the reference printed on the installed part and check whether it matches the catalogue reference 05741000. 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 and faults that the PCB 05741000 resolves.

The PCB controls the ignition, modulation, and safety features of the boiler. These are the typical symptoms and what to do:

Common symptoms and faults

• 01

  The boiler does not ignite and shows no lights or sounds.

  Cause: The main PCB does not start the ignition because it does not receive or process the power supply correctly.

  Check that 230V is reaching the input of the PCB and verify that the main fuse is not blown.

• 02

  You change the temperature or press the controls and the boiler does not respond.

  Cause: The PCB is not processing the commands from the keyboard or the connected thermostats.

  Try another thermostat or connect the corresponding terminals to rule out that the fault comes from outside the PCB.

• 03

  They tell you that 'it's the PCB' but it's better to confirm it before buying it.

  Cause: Many symptoms from sensors, gas valves, or wiring can appear to be a fault in the PCB without actually being one.

  Ask them to check the pressure switch, the NTC sensor, and the connections before replacing the entire PCB.

• 04

  The boiler turns on by itself or behaves strangely without anyone touching the controls.

  Cause: A fault in the PCB can activate relays or outputs without a real command behind it.

  Disconnect the remote keyboard if there is one and observe if the erratic behavior continues, to determine if the source is in the PCB or in a peripheral.

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 the Saunier Duval 05741000 PCB.

Catalogue reference

05741000

Brand

Saunier Duval

Type of part

PCBs (control boards)

Units in stock

5 units

Status

Refurbished

Warranty

1 year

Shipping

Delivery time shown at checkout

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.

PCB code (silkscreen, rear side)

ST1389 CAD 4029

Printed code (back side)

109042/F

Relay model

F-RELCO 138.66, TUV certification

Connectors (rear side)

CN7, CN9, CN10, CN11, REL1, P2, P3, P4

Manuals and technical documentation

Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.

• Saunier Duval F 23 E Manual (PDF)Document © Saunier Duval, provided as a technical reference.