Wilo Circulating Pump Saunier Duval Micraplus Condens 25-A Ref. 0020186158
The Wilo Saunier Duval Micraplus Condens 25-A circulator pump is responsible for moving water through the heating circuit, ensuring proper heat distribution. When it malfunctions, the user may notice cold radiators, strange noises, overheating, or blockages due to lack of circulation. This pump is compatible with boilers from the Micraplus Condens range, such as the Micraplus Condens 25-A and 30-A models, among others. It is recommended to replace it when these symptoms are detected or when faults such as F.89, F.23, F.24, or F.75 occur.
VAT included
Consult via WhatsAppHermann boilers compatible with reference 0020186158
Circulating pump with reference 0020186158. 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 reference 0020186158 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 0020186158. 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 circulation pump 0020186158 resolves.
The circulation pump circulates the water in the heating circuit. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
The boiler is not heating properly or is modulating strangely, as if it is not adjusting the power.
Cause: If the circulation is not stable, the modulation system does not receive reliable data and operates poorly.
Make sure the pump rotates at a constant speed and does not vary on its own before considering it faulty.
- 02
There is noise coming from the pump motor.
Cause: There may be air in the circuit or the impeller may be rubbing due to limescale buildup.
Bleed the air from the header and check the water hardness of the system before replacing the pump.
- 03
There is a water leak in the area of the pump.
Cause: The mechanical seal loses tightness over time with use.
Check the gaskets of the union flanges before concluding that the leak comes from the body of the pump.
- 04
The pump electronics (PWM) do not respond or do not start.
Cause: The PWM control signal received from the PCB may fail, not just the motor.
Check the connector and the PWM signal cable before replacing the entire pump.
Fault codes Hermann that this part solves
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F.89 | Error: pump | The heating pump is disconnected, poorly connected, or short-circuited; the electronics detect a specific circulator fault. Check by measuring voltage/continuity at the pump connector and forcing a function test. |
| F.23 | Safety shutdown: temperature variation too large (NTC1/NTC2) | Blocked pump or reduced power causes insufficient circulation and an excessive flow/return ΔT. Check by forcing degassing (P.06/P.07), feeling for pump vibration/noise, and checking flow/air in the circuit. |
| F.24 | Safety shutdown: temperature rise too fast | If the pump does not circulate flow, the heat is not dissipated and the temperature rise is very rapid. Verify by activating pump tests (P.06/P.07), checking voltage at the pump, and bleeding the system. |
| F.75 | Fault: pressure sensor | In these models, the unit expects to see a pressure increase when the pump starts; if the circulator is blocked or does not start, there is no variation and F.75 appears. Check that the pump is rotating/powered and that the Δp increases when circulation begins. |
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 circulation pump Hermann 0020186158
- Catalogue reference
- 0020186158
- Brand
- Hermann
- Type of part
- Pumps
- Units in stock
- 1 unit
- 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.
- manufacturer
- Wilo
- model (motor)
- MS/7-A5/PWM1
- Wilo article code
- 0020209067
- secondary code
- 401891
- Wilo code
- 4533743
- batch / date
- 902205 / 22W05 2202733 / 000166 T0
- degree of protection
- IPX4D
- nominal pressure
- PN6
- maximum fluid temperature (TF)
- 95
- power supply
- 1-230V, 50/60Hz
- power
- 1-45 W
- maximum current
- Imax 0.44 A
- energy efficiency index (EEI)
- ≤0.20 - Part 3
- manufactured by
- Wilo Intec, 50 av L. Casella, F-18700 Aubigny/Nère (France)
Frequently asked questions about the circulator pump 0020186158
Who actually manufactures the pump for the Saunier Duval Micraplus Condens 25-A?
Does this Wilo pump from the Micraplus Condens 25-A also work for Protherm or Hermann boilers?
What motor does the pump of the Saunier Duval Micraplus Condens 25-A have?
What is the electrical consumption of this pump before replacing it in my Micraplus Condens 25-A?
When should this pump of the Micraplus Condens 25-A be replaced?
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