Fagor PCB FEB20E1N Ref. MU0870700
The control PCB Fagor FEB20E1N manages the ignition, burner modulation, pump, and safety features of the boiler. When it fails, the boiler does not start, locks out, or exhibits erratic behavior, potentially displaying fault codes F5 or F10. This part is compatible with several boiler models, including Fagor Ecoplus FEB 20 E, Ecocompact FE 20 E, FA 20 E, among others. It is recommended to replace it when the mentioned symptoms or related fault codes are detected.
VAT included
Consult via WhatsAppFagor boilers compatible with reference MU0870700
PCB with reference MU0870700. 23 verified compatibilities: FEB 20 E/1 N and FEB20E H/1 N.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Fagor FEB 20 E/1 N | Fagor Ecoplus FEB 20 E | Contrasted |
| Fagor FEB20E H/1 N | Fagor Ecoplus FEB 20 E | Contrasted |
| Fagor FEB20EF/1 N | Fagor Ecoplus FEB 20 E | Contrasted |
| Fagor FEB20EF/1 LPG | Fagor Ecoplus FEB 20 E | Contrasted |
| Fagor FEB 20 | Fagor Ecoplus FEB 20 E | Contrasted |
| Fagor FE20E/2 N | Fagor Ecocompact FE 20 E | Contrasted |
| Fagor FE20E/2 B | Fagor Ecocompact FE 20 E | Contrasted |
| Fagor FE20EF/2 N | Fagor Ecocompact FE 20 E | Contrasted |
| Fagor FE20EF/2 LPG | Fagor Ecocompact FE 20 E | Contrasted |
| Fagor FA20E2 H N | Fagor FA 20 E | Contrasted |
| Fagor FA20E2F/1 N | Fagor FA 20 E | Contrasted |
| Fagor FA20E2F/1 LPG | Fagor FA 20 E | Contrasted |
| Fagor FA20EV2/1 N | Fagor FA 20 E | Contrasted |
| Fagor FA20ET2/1 N | Fagor FA 20 E | Contrasted |
| Fagor FEE20/2 N | Fagor FEE 20 | Contrasted |
| Fagor FEE20/2 B | Fagor FEE 20 | Contrasted |
| Fagor FEE20 | Fagor FEE 20 | Contrasted |
| Fagor CA 20 E | Fagor CA 20 E | Contrasted |
| Fagor CE 20 E-1 | Fagor CA 20 E | Contrasted |
| Fagor FES28AE/1 N | Fagor FES 28 AE | Contrasted |
| Fagor FES28AE/1 B | Fagor FES 28 AE | Contrasted |
| Fagor FE28E/1 B | Fagor FE/FEE 28 | Contrasted |
| Fagor FEE28/1 B | Fagor FE/FEE 28 | 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. MU0870700 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 MU0870700. 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 MU0870700 PCB solves.
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 shows no signs of life: no lights, no display, and no noise when turned on.
Cause: The PCB does not distribute power to the control circuits, usually due to a blown fuse or an internal fault.
Before changing the PCB, check the condition of the transformer fuse and measure if there is power at the input.
- 02
The display flashes with a different fault code each time, with no changes in the installation.
Cause: The PCB electronics are failing and generating erratic faults even though the sensors are functioning properly.
Note the codes that appear over a few days; if they change without apparent reason, suspect the PCB and not the indicated sensor.
- 03
The boiler ignites, operates for a while, and then shuts down on its own without any visible errors on the display.
Cause: An intermittent fault in the PCB randomly interrupts the control sequence.
Reset the boiler and note how long it takes to turn off; if the time is always different, it is advisable to rule out the temperature sensors first.
- 04
The hot water or heating does not respond even if you increase the temperature from the control.
Cause: The PCB does not transmit the thermostat demand to the ignition stage.
Try to force the manual ignition from the boiler panel to check if it responds without the remote control.
Fault codes for Fagor that this part resolves.
| Code | Fault | Diagnosis and solution |
|---|---|---|
| F5 | Control board fault: internal fault in the electronic circuit that locks the boiler. | It is the code that points directly to THIS part (the main PCB MU0870700): it is triggered when the electronics/software protections of the board detect an internal fault. Verify by replacing or checking the control board after ruling out power supply; if it persists after a reset (switch to O and back to position), the board is the cause. |
| F10 | Fault in the control or closure of the gas valve (the boiler locks and cannot be unlocked). | The Fagor documentation explicitly states that it could be "a fault in the control circuit or the gas valve," so the MU0870700 PCB (control/modulation stage of the valve) is a documented cause, not just the valve. Verify by measuring the modulation signal delivered by the PCB to the valve; if the valve and its wiring are correct, the origin is the PCB. |
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 MU0870700 PCB.
- Catalogue reference
- MU0870700
- Brand
- Fagor
- Type of part
- PCBs (control boards)
- 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.
- Transformer brand
- DISPLAY
- Transformer code
- 1122893A
- Transformer power
- 12VA
- Primary of the transformer
- 230V, 80mA T (slow) fuse
- Secondary windings of the transformer
- 14V/0.85A and 28V/1mA
- Transformer regulations
- EN 60742
- Transformer core
- EI54/19
- Operating temperature of the transformer
- ta 40°C / class B, 50/60Hz
Frequently asked questions about the PCB MU0870700
What transformer does the PCB of the Fagor FEB20E1N use?
Is this PCB suitable for a Fagor FA20E2N boiler?
When should this PCB be replaced in a Fagor FEB20E1N boiler?
Spare parts related to Fagor Ecoplus FEB 20 E
