Main PCB Vaillant Group For Saunier Duval Themafast Condens F30 Ref. 0020018278
Main PCB manufactured by Vaillant Group, the parent company of Saunier Duval, for the Themafast Condens F30 range. The silkscreen on the board shows the code 0020018278, the actual manufacturing code; the commercial sales reference from Saunier Duval is 0020204482. It operates at 230V on the main terminal block and 24V on the thermostat terminal, and includes a T4A 250V protection fuse.
VAT included
Consult via WhatsAppSaunier Duval boilers compatible with reference 0020204482
PCB with reference 0020204482. Four confirmed compatibilities: Duval Thema Condens AS 30-A and Duval Themafast Condens F25.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval Thema Condens AS 30-A | Saunier | Contrasted |
| Saunier Duval Duval Themafast Condens F25 | Saunier | Contrasted |
| Saunier Duval Duval Themafast Condens F30 | Saunier | Contrasted |
| Saunier Duval Themafast Condens F30 E | Saunier | Contrasted |
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. 0020204482 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.
- Find the reference printed on the installed part and check whether it matches the catalogue reference 0020204482. If it is not visible, do not identify the part from its shape alone.
- Check the full boiler model on its data plate and look for it in the model associations on this page.
- Compare the connections and physical body with the original part before installation.
- If anything is unclear, send us a photo of the marking via WhatsApp before placing your order.
Symptoms and faults that the PCB 0020204482 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 is completely dead, with not a single LED lit.
Cause: The protection fuse (T4A 250V) on the PCB has blown, cutting off all power.
Check the fuse with a multimeter for continuity before replacing the entire PCB; it's a quick part to check.
- 02
The boiler ignites, but the thermostat does not send or cut the heating demand.
Cause: The 24V terminal of the thermostat is a circuit independent of the 230V power circuit and can fail separately.
Check that the thermostat is making contact and that the wiring of the 24V terminal block is not loose before replacing the PCB.
- 03
A fault code appears on the screen intermittently without any apparent cause.
Cause: Internal fault of the PCB that results in an intermittent fault code.
Note the exact code and check if it always repeats the same before discarding the PCB.
- 04
You buy the PCB and the reference does not match exactly with the one that was installed.
Cause: In this boiler, the code printed on the silkscreen (0020018278) is different from the commercial sales reference (0020204482).
Check the code recorded on your current PCB, not just the commercial reference, before ordering it.
Fault codes from Saunier Duval that this spare part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F.63 | EEPROM fault: error in the memory/electronics of the main control board. | It is directly caused by the PCB itself (corrupt EEPROM memory or faulty electronics). Check: power reset; if it persists after ruling out connections, the PCB is the cause and usually requires replacement/recoding. NOTE: in older non-Condens ranges, this code has a different meaning (gas valve with delay), which is why the attribution to the PCB is firm only for the ThemaFast Condens range. |
| F.64 | Fault in the electronics / NTC: fault in the PCB electronics (associated with the NTC sensor circuit). | The PCB generates this fault when its own circuitry fails. Check: first rule out a short circuit in NTC sensors and harness; if the sensors are correct, the cause is the PCB. (The '/NTC' implies also checking the sensor before confirming the PCB.) |
| F.65 | Electronic temperature fault: the PCB has overheated or is faulty. | It is caused by the PCB itself when it detects excessive temperature in its electronics or an internal fault. Check: rule out external overheating/ventilation; if the ambient temperature is normal, the origin is the PCB. |
| F.42 | Coding resistor fault: short circuit/interruption of the power class or gas type coding resistor (on the PCB). | Very relevant when installing THIS spare PCB: after mounting/replacing the PCB, the coding resistor must be checked; a short circuit/interruption in it (on the PCB or heat exchanger harness) triggers the F.42. Verify the continuity of the resistor and correct coding after the PCB change. NOTE: the resistor may be located in the heat exchanger harness, not just on the PCB. |
| F.70 | Invalid product code (DSN): the boiler does not recognise its product identification after an electronics change. | Characteristic when replacing the PCB (display and/or PCB changed without recoding) or due to incorrect/missing power class coding resistor. Verify: recode the product (DSN) after installing this spare part and check the coding resistor. |
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 PCB 0020204482
- Catalogue reference
- 0020204482
- Brand
- Saunier Duval
- Type of part
- PCBs (control boards)
- Units in stock
- 9 units
- 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.
- Manufacturing code printed on PCB
- 0020018278
- Production code
- 90540203 N0167 14.10
- Supply voltage
- 230V (main terminal block) / 24V (thermostat terminal block)
- Fuse
- T4A 250V
- Commercial reference for sale (Saunier Duval)
- 0020204482
- Manufacturer
- Vaillant Group (silkscreen 'V-Group' + 'PM-02' on the PCB); commercial brand Saunier Duval / Hermann Saunier Duval
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Saunier Duval Themafast Condens F30 E Manual (PDF)Document © Saunier Duval, provided as a technical reference.
Frequently asked questions about the PCB 0020204482
Is the PCB Ref. 0020018278 an original Saunier Duval board?
Does this PCB work for the Saunier Duval Thema Condens AS 30-A?
What voltage does the terminal block of the thermostat on this PCB support?
What fuse is mounted on the main PCB of the Themafast Condens F30?
How many models are compatible with the main PCB PLSA126?
What fault codes are documented for this PCB?
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