Main PCB Hermann Micraplus NOx 24 B 2 Ref. 0020184123
Refurbished Hermann PCBs (control boards)

Main PCB Hermann Micraplus NOx 24 B 2 Ref. 0020184123

The Main PCB Hermann Micraplus NOX 24 B 2 Ref. 0020184123 controls the ignition, burner modulation, pump, and safety features of the boiler. When it fails, the boiler may not start, lock out, or behave erratically, displaying the fault code F63: Main printed circuit fault. This board is compatible with Hermann models such as the Micraplus NOx 24-B/2 and with Saunier Duval models like the Micraplus NOx 24, Micraplus NOx 25, and others from the Thema range. A technician must confirm through diagnosis whether it is necessary to replace it when the mentioned symptoms occur or if a fault in the printed circuit is indicated.

Type of part
PCBs (control boards)
Status
Refurbished
Catalogue reference
0020184123
Warranty
1 year
VAT included OUT OF STOCK
Compatibility

Hermann boilers compatible with reference 0020184123

PCB with reference 0020184123. Nine confirmed compatibilities: Micraplus NOx 24-B/2 and Duval Micraplus NOx 24.

Verified compatibility

Boiler modelFamilyVerification
Hermann Micraplus NOx 24-B/2HermannVerified
Hermann Duval Micraplus NOx 24SaunierVerified
Hermann Duval Micraplus NOx 25SaunierVerified
Hermann Duval Thema NOx F25SaunierVerified
Hermann Duval Thema NOx F25 B/2SaunierVerified
Hermann Duval Thema NOx F25-BSaunierVerified
Hermann Duval Thema NOx F30SaunierVerified
Hermann Duval Themafast NOx F25-ASaunierVerified
Hermann Duval Themafast NOx F30SaunierVerified

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

Guide

How to check if ref. 0020184123 is the part for your boiler

The part reference, model, and equipment revision must be verified against the manufacturer's documentation.

  1. Find the reference printed on the installed part and check whether it matches the catalogue reference 0020184123. If it is not visible, do not identify the part by 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 that require diagnosis on the PCB 0020184123

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 unresponsive, neither the clock nor the indicators light up.

    Cause: The PCB has stopped receiving power and cannot be repaired.

    Check the fuse on the PCB and the input voltage before replacing it.

  • 02

    The display shows an error and the boiler locks out for no apparent reason.

    Cause: The electronics receive an incorrect signal from a sensor, such as the NTC sensor or the pressure switch, and stops the cycle.

    Note the fault code and check the connector of the affected sensor before requesting the new PCB.

  • 03

    The remote control or the programmer cannot turn on the boiler even though they request heating.

    Cause: The PCB is not receiving or interpreting the demand system signal.

    Check that connectors X2 and X41 are properly connected and free of oxidation before replacing the PCB.

  • 04

    The boiler operates intermittently and shuts down by itself repeatedly.

    Cause: An internal fault in the electronics, which cannot be repaired, causes interruptions in operation.

    Check if the fault disappears when you reset the boiler; if it returns quickly, it is more likely to be the PCB and not a loose sensor.

Hermann fault codes that require diagnosis

CodeFaultTechnical checks
F63Main PCB faultThe EEPROM/electronics of the main board is damaged or corrupted, causing the equipment to lock. Check the board voltages, connections, and if the issue persists, replace/reprogram the PCB 0020184123.

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 PCB Hermann 0020184123

Catalogue reference
0020184123
Uniclima internal SKU
PECHMN24B/2
Brand
Hermann
Type of part
PCBs (control boards)
Units in stock
0 units
Status
Refurbished
Warranty
1 year
Shipping
Delivery time shown at checkout
Return
14 days

Part data and available documentation

Contrast the label codes, PCB, and revision with the installed part; they are not necessarily equivalent references.

Connector silk-screening
X2/HYd, V-Group, PM-02, X102 P2, X41 Text/PTank
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 0020184123

Is this PCB with reference 0020184123 the one used in the Hermann Micraplus NOx 24-B/2?
Yes, this PCB is listed with the reference 0020184123 for the Hermann Micraplus NOx 24-B/2; the silk-screened connections (X2/HYd, PM-02, X102 P2, X41) match the original.
Is this PCB suitable for a Saunier Duval Thema NOx F30?
Yes, the Thema NOx F30 is among the Saunier Duval models compatible with this PCB, within the same range as the Micraplus/Themafast NOx.
When should this PCB for the Micraplus NOx 24-B/2 be replaced?
It should be checked when the installed PCB fails and cannot be repaired. The replacement requires a technical diagnosis.

Spare parts related to Hermann Saunier

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1-year warranty inspected and tested
14-day return uninstalled parts
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Main PCB Hermann Micraplus NOx 24 B 2 Ref. 0020184123