Hermann Micraplus Condens 25 A Display PCB Ref. 0020195591
The Hermann Micraplus Condens 25 A Display Board Ref. 0020195591 is a control PCB that manages the ignition, burner modulation, pump, and safety features of the boiler. When it fails, the boiler may not start, become locked, or behave erratically, showing symptoms such as fault code F.70 or communication issues between the circuit board and the user interface. This part is compatible with the Micraplus Condens 25-A and 30-A models, among others. It should be replaced when these faults occur or anomalies in operation are detected.
VAT included
Consult via WhatsAppHermann boilers compatible with reference 0020195591
PCB with reference 0020195591. Two confirmed compatibilities: Micraplus Condens 25-A and Micraplus Condens 30-A.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Hermann Micraplus Condens 25-A | Micraplus Condens | Contrasted |
| Hermann Micraplus Condens 30-A | Micraplus Condens | 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 the ref. 0020195591 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 0020195591. 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 0020195591 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 screen does not turn on, it remains completely black.
Cause: The display module is not receiving power or signal from the main PCB, although the boiler may still be running internally.
Make sure that the J4-3 connector is properly seated and that there are no bent pins before replacing the display.
- 02
The digits or icons appear and disappear for no reason, or they are partially visible.
Cause: A poor connection in the flat cable that connects the display to the main PCB causes these intermittent image faults.
Disconnect and reconnect the flat cable, and check that it is not bent or that the connector tracks are not damaged.
- 03
The boiler continues to heat normally, but nothing is visible on the display.
Cause: The display only manages visualization; the control of combustion is handled by the main PCB, which is why the service can continue even if nothing is visible.
Check if the boiler heats despite the display being off; this confirms that the fault is in the screen and not in the rest of the installation.
- 04
The fault codes and the setpoint temperature cannot be viewed or changed.
Cause: Without an operational display, the only channel for reading and controlling the boiler from the unit itself is lost.
If you have an app or remote thermostat, check if the parameters can be read from there; this way you isolate the fault on the display.
Fault codes Hermann that this part solves
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F.70 | Invalid product code (DSN). | This appears when the user interface board (display) and/or the main board have been replaced simultaneously without resetting the device identification (DSN) or with incorrect/missing power coding resistors; check the coding/DSN in service mode and, if applicable, try with the original display or reprogram/adjust the coding. |
| Connection | No communication between the main PCB and the user interface. | A fault in the display PCB (0020195591), its power supply, or the harness/connector can interrupt communication with the main PCB; check power supply voltages to the screen, connectors/wiring, and, if possible, temporarily replace the screen with a known working one to rule out the main PCB. |
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 PCB Hermann 0020195591
- Catalogue reference
- 0020195591
- Brand
- Hermann
- 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.
- connector
- J4-3
Frequently asked questions about the PCB 0020195591
Is this display PCB suitable for a Hermann Micraplus Condens 30-A?
What connector is identified on this PCB of the Micraplus Condens?
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