Viessmann Vitopend 100 PCB Ref. 7827494
Viessmann Vitopend 100 includes the PCB that controls the ignition, the modulation of the burner, the pump, and the safety features of the boiler. When this part fails, the boiler may not start, lock out, or behave erratically, displaying fault codes such as UFE, UF9, UFd, U02, or U11. It is installed in models such as Vitopend 100 WH0 and Vitopend 100 WH0A, among others. It is advisable to replace it when it shows signs of malfunction.
VAT included
Consult via WhatsAppViessmann boilers compatible with reference 7827494
PCB with reference 7827494. Two confirmed compatibilities: Vitopend 100 WH0 and Vitopend 100 WH0A.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Viessmann Vitopend 100 WH0 | Viessmann Vitopend 100 | Contrasted |
| Viessmann Vitopend 100 WH0A | Viessmann Vitopend 100 | 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. 7827494 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 7827494. 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 7827494 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 thermostat is calling for heat, but the boiler does not start even though it has power and gas.
Cause: The PCB does not process the demand signal due to a fault in the input stage.
Bypass the thermostat directly at the terminals: if it starts this way, the problem is with the thermostat or the wiring, not the PCB.
- 02
The boiler stops in the middle of a cycle and needs to be reset to continue.
Cause: An intermittent fault in the PCB causes interruptions that reset the control.
Check that the connectors and the wiring harness of the PCB are properly fitted and free of moisture.
- 03
The relay that should activate the pump or the gas valve is not switching
Cause: The output stage of the PCB that controls that component has stopped working.
Measure with a multimeter if there is voltage at the corresponding connector when the boiler should activate it, before replacing the PCB.
- 04
An error code appears on the display that does not disappear when resetting the boiler.
Cause: The control detects an internal fault and locks the equipment for safety.
Note the code and compare it with the Viessmann fault table: some codes indicate a sensor or an external component, not the PCB.
Fault codes Viessmann that this part solves
| Code | Fault | Diagnosis and solution |
|---|---|---|
| UFE | Fault in the Brennersteuergerät (burner control unit/PCB). | Internal fault or defective parameterization of the control board (LGM27, ref. 7827494); check power supply, connectors/wiring, and board coding; if the fault persists, replace the board. |
| UF9 | Fault in the Brennersteuergerät (burner control unit/PCB). | The control board (LGM27, ref. 7827494) detects an internal fault condition; after checking electrodes/ionisation and gas, if it reappears, check connections and replace the PCB. |
| UFd | Fault in the Brennersteuergerät (burner control unit/PCB). | Recurrent internal error of the control module (LGM27, ref. 7827494); check wiring/coding and, if not restored, replace the PCB. |
| U02 | Fault in the Brennersteuergerät (burner control unit/PCB). | Anomalous defect/parameterization in the control board (LGM27, ref. 7827494); check power supply and connectors, and if it reappears, replace the board. |
| U11 | Fault in the Brennersteuergerät (burner control unit/PCB). | Internal fault of the electronic module (LGM27, ref. 7827494); check connections/coding and replace the PCB if the equipment does not reset. |
| U0C | Fault in the Brennersteuergerät (burner control unit/PCB). | Internal error/ADC or incorrect configuration on the PCB (LGM27, ref. 7827494); check power supply, connectors X13/VR20 and, if it persists, replace the PCB. |
| U0d | Fault in the Brennersteuergerät (burner control unit/PCB). | The control board (LGM27, ref. 7827494) remains in fault/locked state; after checking external causes and performing a reset, replace the board if the fault reappears. |
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 Viessmann 7827494 PCB.
- Catalogue reference
- 7827494
- Brand
- Viessmann
- Type of part
- PCBs (control boards)
- Units in stock
- 3 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- 1-2 business days
- Return
- 14 days
Frequently asked questions about the PCB 7827494
Is this PCB Ref. 7827494 suitable for the Viessmann Vitopend 100 WH0A?
Is the same PCB used for the Vitopend 100 WH0 and the WH0A?
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