Wilo Circulating Pump FRSL15/4.1 HE-3 KU C For Cointra Excellent Micro LN 24 E
When the heating system starts, the Wilo FRSL15/4.1 HE-3 KU C Circulating Pump is responsible for moving water through the heating circuit. This pump from the Wilo brand, with reference FRSL15/4.1, allows for proper water flow, and its failure can cause cold radiators, strange noises, overheating, or blockages due to lack of circulation. It is compatible with boilers such as the Cointra Excellent Micro 24 E, among others. It is recommended to replace it when these symptoms occur or a decrease in the performance of the heating system is detected.
VAT included
Consult via WhatsAppCointra boilers compatible with reference 39818450
Circulating pump with reference 39818450. Nine confirmed compatibilities: Domiproject F24 and Domiproject F32.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Cointra Domiproject F24 | Ferroli Domiproject | Contrasted |
| Cointra Domiproject F32 | Ferroli Domiproject | Contrasted |
| Cointra Domiproject D F24 | Ferroli Domiproject | Contrasted |
| Cointra Domiproject D F32 | Ferroli Domiproject | Contrasted |
| Cointra Domicompact F24 | Ferroli Domicompact | Contrasted |
| Cointra Domicompact F30 | Ferroli Domicompact | Contrasted |
| Cointra Domicompact C24E | Ferroli Domicompact | Contrasted |
| Cointra Essential 24E | Cointra (rebadge Ferroli) | Contrasted |
| Cointra Excellent Micro 24E | Cointra (rebadge Ferroli) | 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. 39818450 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 39818450. 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 39818450 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 does not heat or takes a long time to heat up.
Cause: If there is insufficient circulation, the hot water is not distributed throughout the circuit.
Check that the thermostat or the control is calling for heating and that there is no shut-off valve closed before inspecting the pump.
- 02
Noise or vibration in the pump when turning on the boiler.
Cause: The most common issue is that there is trapped air in the circuit, not an internal fault of the motor.
Bleed the air through the screw on the pump head and check again before replacing it.
- 03
The heating circuit is not circulating, although the burner ignites correctly.
Cause: The impeller may be blocked or the motor may not start due to an electrical fault.
With the boiler turned off, try to turn the pump shaft with a screwdriver to check if it is seized.
Fault codes for Cointra that this part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F43 | Activation of the heat exchanger protection. | A blocked circulation pump (ref. 39818450) or one without flow prevents water circulation and overheats the heat exchanger; the boiler triggers F43. Check that the pump receives voltage, rotates freely, delivers flow, and bleed the air from the circuit. |
| A03 | Overtemperature protection activation. | If the circulation pump does not move the water, the flow temperature rises quickly and activates the overtemperature protection. Check the pump's power supply and consumption, ensure the shaft is not seized, and verify there is actual circulation (bleed/filters). |
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 Cointra 39818450 circulation pump.
- Catalogue reference
- 39818450
- Brand
- Cointra
- 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
- type
- FRSL15/4.1 HE-3 KU C
- number
- N° 4516608
- Voltage frequency
- ~230V-50Hz
- Insulation class
- Class F
- Nominal pressure
- PN6
- Winding thermal
- TF95
- protection
- IP44
- capacitor
- 2µF
- Power current
- I 0.16A/36W · II 0.24A/54W · III 0.30A/70W
- The actual manufacturer of the pump is Wilo, not Cointra; Cointra installs it in their boilers but does not manufacture it.
Frequently asked questions about the circulator pump 39818450
Is the Wilo FRSL15/4.1 HE-3 KU C pump suitable for my Cointra Excellent Micro LN 24 E?
Is this the original pump that fits the Cointra Excellent Micro LN 24 E?
When should this pump be replaced in the Cointra Excellent Micro LN 24 E?
How many models are compatible with the Wilo FRSL15/4.1 HE-3 KU C pump?
What fault codes are documented for this pump?
Where can I find the reference for this pump?
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