Wilo Circulating Pump for Ariston Egis NOx 24 FF Ref. 65110944
The Wilo circulator pump for Ariston Egis NOX 24 FF is responsible for moving water through the heating circuit. When it fails, you may notice cold radiators, strange noises, overheating, or blockages due to lack of circulation. This pump is compatible with models such as Ariston Egis NOX 24 FF, Ariston Egis NOX 28 FF, Chaffoteaux Pigma NOX 24 FF, and Pigma NOX 28 FF, among others. A technician must confirm through diagnosis whether it needs to be replaced when you experience symptoms of lack of circulation, such as fault codes E04 or E14.
- Type of part
- Pumps
- Status
- Refurbished
- Catalogue reference
- 65110944
- Warranty
- 1 year
Ariston boilers compatible with reference 65110944
Circulating pump with reference 65110944. Four confirmed compatibilities: EGIS NOX 24 FF and EGIS NOX 28 FF.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Ariston EGIS NOx 24 FF | Ariston Egis Nox | Contrasted |
| Ariston EGIS NOx 28 FF | Ariston Egis Nox | Contrasted |
| Ariston PIGMA NOx 24 FF | Ariston/Chaffoteaux Pigma Nox | Contrasted |
| Ariston PIGMA NOx 28 FF | Ariston/Chaffoteaux Pigma Nox | 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. 65110944 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 65110944. 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 in the circulator pump 65110944
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 radiators are cold or lukewarm even though the boiler turns on and the burner operates normally.
Cause: The pump is not circulating the water through the system, and the generated heat is not reaching the radiators.
Place your hand on the pump body and check if it vibrates or hums when the heating starts, indicating that it is trying to turn but cannot.
- 02
The pump makes a buzzing or whistling noise but does not start.
Cause: The rotor is seized, usually due to sediment or lime buildup after a period of inactivity.
With the boiler turned off and cold, try to unlock the shaft with a flathead screwdriver in the front slot of the rotor before replacing the entire pump.
- 03
The pump has been working fine for months, and suddenly it won't start when resuming heating after the summer.
Cause: Without circulation for months, lime and circuit residues deposit and seize the rotor shaft.
Do not force, hit, or bridge the component. Request a technical check according to the equipment manual before deciding on its replacement.
- 04
Moisture or water dripping appears around the pump body, in the area where it connects to the motor.
Cause: The mechanical shaft seal has worn out and no longer retains the water in the circuit.
Dry the area thoroughly and check again after a while of operation to confirm whether the leak is continuous and not just occasional condensation.
Ariston fault codes that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| E04 | Lack of pump circulation or insufficient pressure in the installation. | If the pump 65110944 is blocked/faulty, there is no flow in the primary circuit and the PCB detects a lack of circulation; first check that the pressure is ~1–1.5 bar and then power the pump, check rotation/consumption and unblock it via the front cap. |
| E14 | Lack of circulation (high thermal gradient). | A pump 65110944 without flow causes a rapid increase in the ΔT in the primary; the electronics interpret a gradient >2 K/s and lock with E14. To verify, bleed the circuit, measure the ΔT flow/return, and check the voltage and effective rotation of the pump. |
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 Ariston circulator pump 65110944
- Catalogue reference
- 65110944
- Uniclima internal SKU
- BCEGISNOX24FF
- Brand
- Ariston
- Type of part
- Pumps
- Units in stock
- 3 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.
- Manufacturer
- Wilo
- Model
- INTNFSL12/5 HE-1 13W46
- Wilo item number
- 4522812
- Voltage / Frequency
- 230V 50Hz
- Power / Current
- 77 W / 0.34 A
Frequently asked questions about the circulator pump 65110944
Does this Wilo pump work for an Ariston Egis NOX 24 FF?
Who manufactures the pump for the Ariston Egis NOX 24 FF?
How do I check if this Wilo pump is the one for my Pigma NOX 28 FF?
What is the power consumption of the pump in the Ariston Egis NOX 24 FF?
Is it the same pump that the Ariston Pigma NOX 28 FF uses?
