Saunier Duval Combitek F 23 E PCB Ref. 05741000
RefurbishedSaunier DuvalPCBs (control boards)Myrra

Saunier Duval Combitek F 23 E PCB Ref. 05741000

Stock · 1 unit

Control PCB for Saunier Duval Combitek F 23 E boilers and similar models from the Thema/Themaplus range. It is printed with 'SAUNIER DUVAL' and a partial code 'ST1485-' cut off by a connector, with no complete reading. It includes a Myrra transformer (23535-A). It is the central control element of the boiler: it is checked when there are ignition faults, electronic errors, or lockouts without apparent mechanical cause.

VAT included

Compatibility

Saunier Duval boilers compatible with reference 05741000

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

Proven compatibility

Boiler modelFamilyVerification
Saunier Duval C 23 EThemaContrasted
Saunier Duval F 23 EThemaContrasted
Saunier Duval C AS 23 EThemaContrasted
Saunier Duval F AS 23 EThemaContrasted
Saunier Duval C 23 EThemaplusContrasted
Saunier Duval F 23 EThemaplusContrasted
Saunier Duval C 23 ECombitekContrasted
Saunier Duval F 23 ECombitekContrasted

Can't see your model or have questions? The printed reference takes precedence. How to check it ·

Guide

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.
Diagnosis and fault codes

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: there is no response, neither on the display nor on the remote control.

    Cause: The PCB controls the boiler; if it does not receive power or a component fails, the system does not work.

    Check the fuse of the PCB and the power supply of the boiler before considering that the board is faulty.

  • 02

    An error code or a lock appears without any mechanical fault being observed.

    Cause: The electronics ensure the safe operation of the boiler; a fault in a sensor or circuit on the PCB can block the unit even if everything else is in good condition.

    Note the exact fault code and check that it is not related to an external component, such as a pressure switch or a sensor, before replacing the PCB.

  • 03

    The remote control or the thermostat is not working, or the boiler does not respond to temperature changes.

    Cause: The communication between the control and the boiler goes through the PCB; if there is a fault in that circuit, the control will have no effect even if it is operational.

    Try to operate the boiler in manual mode, directly from the unit, to determine if the fault is in the PCB or in the control.

  • 04

    Burnt components, dark stains, or a burnt smell are observed on the PCB.

    Cause: Voltage spikes and the wear of components such as capacitors or triacs can lead to their degradation and eventual failure.

    Inspect the PCB backlit for dark spots or swollen capacitors before confirming the need for a replacement.

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.

Technical data

Data sheet for the Saunier Duval 05741000 PCB.

Catalogue reference
05741000
Brand
Saunier Duval
Type of part
PCBs (control boards)
Units in stock
1 unit
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.

Silkscreen on PCB
SAUNIER DUVAL
Manufacturing date / batch
1293
Transformer - manufacturer
Myrra
Transformer - code
23535-A 500S w:708
Transformer - primary
6-10 24V~ 50/60Hz
Transformer - secondary
1-3 40V~ 3.00A
Documentation

Manuals and technical documentation

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

Frequently Asked Questions

Frequently asked questions about the PCB 05741000

What brand is printed on the PCB of the Saunier Duval Combitek F 23 E?
SAUNIER DUVAL, on the screen printing of the circuit.
Can the complete code ST1485 be read on this PCB of the Combitek F 23 E?
No; it is cut off by a connector, it only reads 'ST1485-'.
Who manufactures the transformer of the PCB of the Thema F 23 E?
Myrra, code 23535-A.
Does this PCB Ref. 05741000 work for the Themaplus C 23 E?
Yes, the Themaplus C 23 E is on the list of compatible models for this part.
What batch is marked on the plate of the Combitek F 23 E?
1293.

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Saunier Duval Combitek F 23 E PCB Ref. 05741000