Fagor PCB FC-32/35 N Ref. 118941 AC
When you open the hot water tap, the Fagor FC-32/35 N AC PCB controls the ignition, burner modulation, pump, and safety features of the boiler. If this part fails, the boiler may not start, become locked, or operate erratically, and you might see fault codes such as E3, E6, or E45. This model is compatible with boilers from the Fagor Natur FC range, such as the FC 24/24 N, among others. Replacing the PCB is necessary when you experience these issues or faults in operation.
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Consult via WhatsAppFagor boilers compatible with reference MUC0800734
PCB with reference MUC0800734. A proven compatibility: FC 24/24 N.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Fagor FC 24/24 N | Fagor Natur FC | 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. MUC0800734 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 MUC0800734. 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 PCB MUC0800734 resolves.
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 respond: the display and indicators are off when connected.
Cause: There is a problem with the internal power supply of the PCB, usually due to a blown fuse or a fault in the power input.
Measure with a multimeter if power is reaching the PCB and check that the fuse is in good condition.
- 02
The display or the indicators are flashing without showing a stable fault code.
Cause: The PCB has an internal fault that prevents it from completing the startup correctly.
Disconnect and reconnect the main power supply; observe if the blinking repeats in the same way, which helps to identify if it is a temporary fault or an issue with the PCB.
- 03
The burner ignites, but the boiler shuts down by itself after a few seconds repeatedly.
Cause: The PCB cuts the signal for safety reasons when it does not consider the information from a sensor to be valid, even if the sensor is functioning properly.
First, check the flame and temperature sensors; if they are fine, the problem may lie in how the PCB interprets their signal.
- 04
The temperature controls do not affect the operation of the boiler.
Cause: The potentiometers or push buttons on the panel are connected to the PCB, which does not process the commands it receives.
Turn the knobs fully in both directions and check for any changes before concluding that the PCB is faulty.
Fault codes for Fagor that this part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| E3 | Control board: faulty | Electronic or power/connections fault in the display board (control panel) causes the error. Check voltages and connectors of the display MUC0800734 and rule out by testing with a known board/temporary replacement. |
| E6 | Detection of a parasitic flame | A defect in the control board/display can falsify the ionisation reading and trigger E6. Check the grounding and ionisation/electrode wiring, and if it persists after combustion checks, replace the display PCB. |
| E45 | Factory setting (automation parameters) | Corruption or internal fault of parameters managed by the control board/display. After attempting reset/reprogramming of parameters, if it persists, replace the display PCB to restore automation. |
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 Fagor MUC0800734 PCB.
- Catalogue reference
- MUC0800734
- Brand
- Fagor
- Type of part
- PCBs (control boards)
- Units in stock
- 5 units
- 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.
- Code recorded on the PCB
- 118941 AC
Frequently asked questions about the PCB MUC0800734
Is this Fagor PCB Ref. 118941 AC compatible with the FC-32/35 N?
Does the Fagor 118941 AC PCB also work for an Avanta Plus 24C?
What code is engraved on this Fagor FC-24/28 (1N) PCB?
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