Viessmann Vitopend 100 WH0A Regulation Module Ref. 7183781
Electronic control module for Viessmann Vitopend 100 boilers. It is a circuit board with the Viessmann logo printed on it, identified on the component itself with the code 7183781. It is responsible for the electronic control of the boiler. Replacement requires first confirming the fault of the part through technical diagnosis, even when this module fails and the unit stops responding or functioning normally.
- Type of part
- PCBs (control boards)
- Status
- Refurbished
- Catalogue reference
- 7827494
- Warranty
- 1 year
Viessmann 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
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 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 that require diagnosis on the PCB 7827494
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 ignite or respond to any commands, as if it were dead.
Cause: The control module manages the ignition and safety features; if it fails, the boiler does not execute any sequence even if there is power and gas.
Check that power is reaching the boiler and that the differential switch in the house has not tripped before considering the module.
- 02
The boiler fails without any visible mechanical cause: no leaks, no noises, with normal pressure.
Cause: It is a typical symptom of a damaged control board, for example after a voltage spike or a nearby storm.
Check if there was a power outage or recent storm and if other appliances in the house were similarly affected.
- 03
The room thermostat or the remote control stops communicating with the boiler.
Cause: The control module is the one that receives and processes that communication; a fault in it breaks the link even if the control is functioning properly.
Change the batteries in the thermostat and repeat the pairing before declaring the boiler module faulty.
- 04
The boiler ignites but turns off by itself erratically, without a clear pattern.
Cause: A control module with intermittent faults may lose signals from the sensors and trigger safety shutdowns without a real reason.
Note when it turns off (during startup, while running, when requesting domestic hot water) to rule out that another component is triggering the safety.
Viessmann fault codes that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| 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). | This symptom may be related to the part, but it does not confirm that it is faulty. A technician must check the equipment and its inspection according to the manual before deciding on a repair or replacement. |
| 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
- Uniclima internal SKU
- DECV2001
- Brand
- Viessmann
- Type of part
- PCBs (control boards)
- Units in stock
- 1 unit
- 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.
- Code printed on the PCB
- 7183781
Frequently asked questions about the PCB 7827494
Is this control module an original Viessmann part?
When should this control module of the Vitopend 100 be replaced?
Spare parts related to Viessmann Vitopend 100
