Saunier Duval Themis 23E PCB Ref. 05712800
RefurbishedSaunier DuvalPCBs (control boards)

Saunier Duval Themis 23E PCB Ref. 05712800

145 €VAT includedIn stock · 4 units

PCB (control board): refurbished spare part that controls the ignition, modulation, and safety features of the boiler. Useful if the boiler does not ignite, locks out, or the display is unresponsive. Compatible with 23 E, 623 E, 23 E (ref. 05712800). 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
05712800
Brand
Saunier Duval
Type of part
PCBs (control boards)
Available units
4 units in stock
Status
Refurbished
Warranty
1 year
Shipping
2–4 working days (EU)
Return
14 days

The same part (ref. 05712800) equips these models. Verified compatibility; check the reference before purchasing.

Thelia

  • 23 E
  • 623 E

Themis

  • 23 E

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)
F.28Fault: unsuccessful ignition on start-upThe PCB may fail (defective electronics) or have the multi-connector improperly plugged in, preventing ignition management; check power supply and ground connections, continuity of the harness, and seating of the multipin on the PCB before replacing it.
F.61Gas valve activation errorThe PCB does not correctly control the gas valve (electronic fault) or shows a fault/short circuit in the driver; check the control output from the PCB, continuity/insulation towards the coils, and if there is no correct signal, replace the PCB.
F.62Gas valve disconnection delay errorAn electronic fault in the PCB may maintain a delayed shutdown command or late flame detection; check the control signal at the gas valve terminals, and if the shutdown command persists without an external cause, replace the PCB.
F.63EEPROM faultFault in the PCB memory (EEPROM) or data corruption; confirm with resets/auto-test, check for stable voltages, and if the fault persists, replace the PCB.
F.64Electronic fault / NTCThe electronics of the PCB are declared faulty or misinterpret sensors due to an internal error; check sensors/harness and, if they are correct, the cause is the PCB.
F.65Fault: PCB temperatureThe PCB detects overheating or a fault in its internal thermal circuit; check ventilation/environment and temperature in the electronic box, and if it reappears without an external cause, replace the PCB.
F.67Fault: electronics/flameThe ionisation signal is not plausible due to a fault in the flame circuit on the PCB; check the electrode/wiring and, if the signal remains abnormal with correct hardware, the cause is the electronics of the board.
F.70Invalid product code (DSN)The display and/or printed circuit board has been replaced without reconfiguring the product code/DSN; check with the service menu and reprogram the code or, if not possible, replace/configure the correct PCB.
How do I confirm that this PCB is the correct one for my boiler?
Check the silkscreened reference 05712800 on your PCB and ensure that your boiler model is on the list of compatible ones; also compare the number and position of the connectors.
Which models is this PCB suitable for?
It is a PCB shared by several models of the same range (see Compatibility tab). If your model does not appear, send us a photo of the silkscreen and we will confirm it.
When installing it, do you need to parameterize or configure anything?
If you replace it with the same reference, it is usually sufficient to replicate the jumpers/configuration of the original; after installation, a technician should verify service parameters (type of gas, power settings) and check combustion and safety features.
Is it the same as the display or control panel?
No. This is the main PCB (controls ignition, modulation, sensor readings, and safety features). The display/user interface is a separate piece; if your fault is with the panel, it is not this PCB.
Why does a PCB fault occur and how can I prevent the new one from failing?
It is usually due to external causes: voltage spikes, shorts in the pump, fan, or valves, humidity, or poor grounding. Before installing the new one, check peripherals, wiring, and connectors, fix water leaks, and verify polarity and grounding.
What does refurbished mean and what coverage does it have?
Part removed from an out-of-service boiler, inspected and bench-tested; not factory new. Includes 1-year warranty and 14-day return policy. Delivery within 2–4 working days in the EU.

Related Spare Parts Boiler Themis 23E

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