Saunier Duval Thema / Combitek PCB - ST1399 CAD 4093

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 ignites but the flame does not modulate: it always stays at maximum or minimum.

  Cause: The PCB controls the modulation of the gas valve; if it fails, it loses control of the flame.

  Check that the ionization electrode is clean and properly positioned.

• 02

  The boiler loses its configuration or settings every time there is a power outage.

  Cause: A fault in the PCB can cause it not to retain the configured parameters.

  Note if the problem always coincides with a power supply interruption.

• 03

  The boiler does not ignite and there are no visible symptoms, no relay noise or LED.

  Cause: Without proper power supply from the PCB, no component works.

  Measure with a multimeter if current is reaching the input of the PCB.

• 04

  The temperature controls of the boiler do not change anything in the actual operation.

  Cause: The adjustment potentiometers are on the PCB; if they degrade, the boiler ignores the changes.

  Turn the controls and check if the display or the behavior of the boiler responds.

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

1 unit

Status

Refurbished

Warranty

1 year

Shipping

1-2 business days

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.

Brand printed on the PCB

SAUNIER DUVAL (hand logo)

PCB code

ST1399 CAD 4093

Transformer code

22S2S-A

Manuals and technical documentation

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

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