Wilo MSL12/5-3 C circulator pump · 4521673 for Fagor FE 24 NOx and FEE 26 TC
Price pending confirmation; please consult us before booking. It is the circulation pump of the boiler: it moves the water through the heating circuit. If the radiators do not heat up even though the boiler is on, or there is noise or leaks in the pump, it is advisable to check it.
- Type of part
- Pumps
- Status
- Refurbished
- internal SKU
- BOM070
- Warranty
- 1 year
Wilo compatible boilers
Circulating pump. Two confirmed compatibilities: Fagor FE 24 NOX and Fagor FEE 26 TC. There are three other models that we are still verifying.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Wilo Fagor FE 24 NOx | WILO | Contrasted |
| Wilo Fagor FEE 26 TC | WILO | Contrasted |
Models pending verification
These models are associated with this reference, but we have not finished verifying them yet, so we do not consider them compatibleIf your boiler is one of them, send us a photo of the part you are going to replace and we will verify it before you purchase.
| Wilo Fagor FE 24 NOx-1, FE 24 TC, FE 24 TC-1, FE 26 TC and FE 26 TC-1 | WILO | Unconfirmed |
|---|---|---|
| Wilo Fagor FEE 24 NOx-1, FEE 24 TC-1 and FEE 26 TC-1 | WILO | Unconfirmed |
| Wilo Fagor FEE 24 NOx B (2012) | WILO | Unconfirmed |
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 it is the part for your boiler
The part reference, model, and equipment revision must be verified against the manufacturer's documentation.
- Look for the label on the pump with the type "MSL12/5-3 C" and the reference 4521673.
- Also compare the marked code 1192325, the 230 V · 50 Hz, the 2 µF capacitor, and the three speeds.
- If your boiler is a Fagor FE 24 NOX or FEE 26 TC, it has been confirmed. For other Fagor models, do not base your purchase on the code AS0008269: some provide it for this pump and others as a motor without a scroll; compare the type on your label, MSL12/5-3 C.
- Do not confuse it with the Wilo MSL12/6-3C, the PARA 15/6-43/SC, or the MSL 12/5-3 C from iVP (87186406590).
- If they match, call us at 911 17 77 77 with the model of your boiler.
Symptoms that require diagnosis in the circulation pump
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 do not heat up even though the boiler turns on.
Cause: To confirm: it says that it is very likely that the circulator is blocked.
- 02
Excessive noise or vibration in the pump area.
Cause: Same.
- 03
The rotor may become stuck after a prolonged stop, especially after the summer.
Cause: Possibility according to the same.
- 04
Visible water leaks on the hydraulic body.
Cause: Same.
- 05
There is no water circulation after a long time without using the boiler.
Cause: Stuck rotor due to prolonged stop. In the Fagor FE and FEE series TC, the boiler starts the pump for 30 seconds every 23 hours of inactivity to prevent this, but only if it remains connected to the power supply.
Check if the boiler has been unplugged or without power during the downtime. If the pump still does not turn with the boiler connected, have a qualified installer check it and, if necessary, replace it.
- 06
The boiler locks with fault code F03: the circuit pressure drops below 0.6 bar or rises above 2.8 bar.
Cause: Circuit pressure out of range: low water, air in the circuit, or excess pressure.
Check the pressure on the display (it should be above 1 bar). If it happens again, have a technician check it.
- 07
The heating circulates poorly: the pump gets stuck or loses power.
Cause: Stuck pump, tired or weak, or air in the circuit.
Have a technician check the pump. If the pump does not start after being idle for a while, contact technical service.
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.
Technical sheet: Wilo circulator pump
- Uniclima internal SKU
- BOM070
- Brand
- Wilo
- Type of part
- Pumps
- Units in stock
- 0 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.
- Commercial reference
- 4521673
- Marked code on the part
- 1192325
- Insulation class
- H
- Nominal pressure
- PN 6
- TF temperature
- 95
- Degree of protection
- IP44
- Condenser
- 2 μF
- Electrical supply
- 230 V~, 50 Hz
- Speed I: intensity and power
- 0.18 A; 39 W
- Speed II: intensity and power
- 0.27 A; 59 W
- Speed III: intensity and power
- 0.35 A; 80 W
- Material marked on the plastic casing
- PA66
- Material marked on the plastic body
- PA66GF30
- Marked without interpretation
- 11W11
- Wilo catalog of the MSL12/5 series (does not distinguish -3 C). The label of this unit (39 · 59 · 80 W; 0.18 · 0.27 · 0.35 A) differs and the catalog does not explain it — Maximum speed
- 2310 rpm · 84 W · 0.37 A · OEM Wilo catalog 09/2017
- Wilo catalog of the MSL12/5 series (does not distinguish -3 C). The label of this unit (39 · 59 · 80 W; 0.18 · 0.27 · 0.35 A) differs and the catalog does not explain it — Central row (without name in the catalog)
- 2040 rpm · 59 W · 0.28 A · OEM catalog Wilo 09/2017
- Wilo catalog of the MSL12/5 series (does not distinguish -3 C). The label of this unit (39 · 59 · 80 W; 0.18 · 0.27 · 0.35 A) differs and the catalog does not explain it — Minimum speed
- 1560 rpm · 40 W · 0.18 A · OEM catalog Wilo 09/2017
- Wilo catalog of the MSL12/5 series (does not distinguish -3 C). The label of this unit (39 · 59 · 80 W; 0.18 · 0.27 · 0.35 A) differs and the catalog does not explain it — Capacitor
- 2 µF · 400 V · Wilo OEM Catalog 09/2017
- Registered model
- MSL12/5-3 C
- Symptoms of a single fault for the Fagor FE 24, FE 26, and FEE 24; this is not an official table.
- To confirm: Fagor FE 24 NOX-1, FE 24 TC, FE 24 TC-1, FE 26 TC, and FE 26 TC-1 — they are listed for AS0008269; only 1 connects it with the MSL12/5-3 C. It does not provide a model and sells a motor.
- To confirm: Fagor FEE 24 NOX-1, FEE 24 TC-1 and FEE 26 TC-1
- To confirm: Fagor FEE 24 NOX B (2012): AS0008269, motor without scroll
- Do not confuse: MSL12/6-3C — Model that corresponds to the motor AS0008269 — The label on this pump states MSL12/5-3 C.
- Do not confuse: FOR 15/6-43/SC — High efficiency pump suitable for the FE-24 NOX with ST0029727 (15-130/6-43-SC) — It is another model; this technical sheet is the MSL12/5-3 C.
- Do not confuse: 87186406590 — Code for a Wilo Intec MSL 12/5-3 C that iVP sells for Bosch Condens 2000 ZWB24 and Buderus GB012 — Same type Wilo, different code; not tested as equivalent.
- (Wilo PARA 15/6-43/SC) and (high efficiency 15-130/6-43-SC) give ST0029727 as another pump. Trust your label, not just the Fagor code.
- Unit confirmed (4521673, MSL12/5-3 C, 1192325). Outside the workshop, only connect 4521673 with the MSL12/5-3 C. Model and type discrepancies: AS0008269 is listed as a motor without a scroll; and ST0029727 is listed as another pump (FOR 15/6-43/SC; 15-130/6-43-SC).
Frequently asked questions about the circulation pump
How do I identify the Wilo MSL12/5-3 C 4521673 pump?
Is it compatible with my Fagor FE 24 NOX or FEE 26 TC?
What other Fagor boilers use this pump?
What do 4521673, 1192325, AS0008269, and ST0029727 mean?
Is the MSL12/5-3 C the same as the MSL12/6-3C, the PARA 15/6-43/SC, or the 87186406590?
What symptoms indicate this pump and who should replace it?
What is the reference for this pump?
What power supply does it need?
