Saunier Duval SDHV 19 Electronic Control Box
When you turn on the tap or start the heating, the Saunier Duval SDHV 19 Electronic Control Box is responsible for controlling the ignition, the modulation of the burner, the pump, and the safety features of your boiler. If this part fails, it is possible that the boiler will not start, become blocked, or behave erratically. It is compatible with the Saunier Duval SDHV 19 boiler, among others. It is recommended to replace it when you notice these anomalies in the operation of your heating or domestic hot water system.
VAT included
Consult via WhatsAppCompatible Saunier Duval boilers
PCB. A proven compatibility: Duval SDHV 19.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval Duval SDHV 19 | Saunier | 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 it 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 —. If it is not visible, do not identify the part by 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 (control board) 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 shows no signs of operation: the display is off, the fan does not start, it does nothing.
Cause: A fault in the power supply to the electronic control box interrupts the supply to the entire control system.
Before changing the PCB, check the internal fuse and make sure that 230V is reaching the input of the junction box.
- 02
A different fault code appears each time, with no clear relation to the actual problem of the boiler.
Cause: When the PCB fails, it incorrectly interprets the signals from the sensors, even if they are functioning correctly.
Check with a multimeter that the connected sensors (NTC sensor, pressure switch) provide consistent values before replacing the control box.
- 03
The room thermostat or the control does not manage to start the boiler, even though it requests heat.
Cause: The relay or the stage that receives that external demand has stopped working inside the control box.
Check that the thermostat wiring is properly connected to the corresponding terminals and that there are no loose jumpers.
- 04
The boiler turns off and on by itself, or it resets during normal operation.
Cause: An internal component damaged by heat, such as a capacitor or a solder joint, loses stability while the boiler is in operation.
Observe if the problem occurs more with the hot boiler than with the cold one; if so, it could be an internal thermal fault of the casing.
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.
Saunier Duval PCB data sheet
- Brand
- Saunier Duval
- 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
- The current catalog does not list any reference for this SKU.
Frequently asked questions about the PCB (control board)
Does this control box work for any Saunier Duval or just for the SDHV 19?
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