PCB Hermann Micraplus Condens 25 / SDV Semia Condens F25-A - Ref. 0020084518
When you turn on the hot water tap or activate the heating, the Hermann Micraplus Condens 25 / SDV Semia Condens F25-A PCB controls the ignition, burner modulation, and pump, ensuring that your boiler operates correctly. If this part fails, you will notice that the boiler does not start, locks out, or exhibits erratic behavior. This model is compatible with boilers from the Hermann Micraplus Condens range, such as Micraplus Condens 25-A and Micraplus Condens 25 A-1, among others. A technician must confirm through diagnosis whether replacement is necessary when these malfunction symptoms occur.
- Type of part
- PCBs (control boards)
- Status
- Refurbished
- Catalogue reference
- 0020084518
- Warranty
- 1 year
Hermann boilers compatible with reference 0020084518
PCB with reference 0020084518. Two confirmed compatibilities: Micraplus Condens 25-A and Micraplus Condens 25 A-1.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Hermann Micraplus Condens 25-A | Hermann Micraplus Condens | Contrasted |
| Hermann Micraplus Condens 25 A-1 | Hermann 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 ref. 0020084518 is the part for your boiler
The part reference, model, and equipment revision must be verified against the manufacturer's documentation.
- Find the reference printed on the installed part and check whether it matches the catalogue reference 0020084518. 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 that require diagnosis on the PCB 0020084518
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 does not turn on and nothing appears on the display, not even the time.
Cause: It is not receiving the correct power supply, so no auxiliary circuit (timer, display, sensors) is functioning.
Check the fuse on the PCB and the power outlet before declaring the part faulty.
- 02
A fault code appears on the screen that repeats even after resetting the boiler.
Cause: The PCB detects a persistent internal fault and keeps it locked until the damaged component is replaced.
Look for the specific code in the manual: some point to the NTC sensor or the pressure switch, not the PCB itself.
- 03
The boiler responds late or erratically to the temperature changes requested.
Cause: If the microprocessor on the PCB is degraded, it takes longer to process or misinterprets the signals from the sensors.
Test with the room thermostat disconnected, using only the boiler's setpoint, to check if the fault is with the PCB.
- 04
There is a burning smell, or the boiler turns off by itself a few minutes after use.
Cause: An overheated component on the PCB (relay, capacitor) can fail intermittently before breaking completely.
With the boiler turned off and cold, visually inspect the PCB for any dark marks or swelling on any component.
Hermann fault codes that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| F.70 | Invalid product code (DSN). | It appears when, after replacing this display board along with the main one, the device identification (DSN) is not reprogrammed or the power coding resistor does not match. Check by entering the technical menu and readjusting DSN/coding, or with a service programmer. |
| Connection | No communication between the main PCB and the user interface. | The display board (interface) is not communicating with the main board due to a fault in the interface itself, wiring/connectors, or bus power supply. Check voltage/bus and continuity of harnesses; test with another interface or inspect connectors in the electronic box. |
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 0020084518
- Catalogue reference
- 0020084518
- Uniclima internal SKU
- DMC25A1
- 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
Frequently asked questions about the PCB 0020084518
Is this DMC25A1 PCB suitable for both the Hermann Micraplus Condens 25 and the Saunier Duval Semia Condens F25-A?
What reference is printed on this PCB DMC25A1?
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