Same part, different name. Vaillant, Bulex and Saunier Duval belong to the same manufacturer group and use the same part numbers: if your Bulex or Saunier Duval part carries number 0020150123, this is that part.
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According to the Vaillant parts lists, this part fits 8 models, including Vaillant flexoTHERM VWF 57/4, Vaillant flexoTHERM VWF 58/4 and Vaillant flexoTHERM VWF 87/4. The full list is under “Fits”.
In stock: order before 14:00 and it ships the same working day; delivery within the EU usually takes 3–5 working days.
Check the rating plate of your appliance before ordering; if in doubt, ask the manufacturer or your installer.
Supplied through the official technical wholesale channel, under Vaillant number0020150123
Also known as: printplaat, besturingsprint, PCB.
Fits 8 Vaillant models
The partVaillant PCB switch box flexotherm 0020150123is in the official parts list of these Vaillant appliances. Click a model for the complete parts list and exploded view.
Check the rating plate of your appliance. Not sure whether this part fits? Check with the manufacturer or your installer; with the correct manufacturer number you can order it here directly.
Does this fit my appliance?
Enter your appliance type, for example as shown on the rating plate. You will see straight away whether the Vaillant PCB switch box flexotherm 0020150123 is in the parts list of that model.
This spare part is shown as position 01 on the parts drawing. Open the drawing for the appliance and click the number to check that you have the right spare part.
According to the fault code database, these Vaillant fault codes point to this type of part. Always check first that the code matches the appliance type on the rating plate.
Contact S20 on heat pump main PCB (HMU) open, incorrect high-limit thermostat setting, flow temperature sensor (heat pump, gas boiler, system sensor) reading too low
Indicative: the same code can have a different cause depending on the situation. Have work on gas, flue or burner adjustment carried out by a qualified installer.
Frequently asked questions about this item
Does the Vaillant PCB switch box flexotherm 0020150123 fit my appliance?
This part is in the parts list of 8 Vaillant models, including the flexoTHERM VWF 57/4, flexoTHERM VWF 58/4, flexoTHERM VWF 87/4, flexoTHERM VWF 88/4. The model type is on the rating plate of your appliance. Use the “Does this fit my appliance?” search box on this page to check your model. If in doubt, ask the manufacturer or your installer.
What is the delivery time for the Vaillant PCB switch box flexotherm 0020150123?
This item is in stock. Ordered before 14:00, it ships the same working day and usually arrives within three to five working days.
Can I return this item?
Yes, as a consumer within 14 days of receipt. You may unpack and inspect the item; for items that have been installed, connected or used (such as circuit boards) we deduct the diminished value. How to register your return is explained on returns.
What does shipping cost?
Shipping costs € 12.95 to Austria, Denmark, Italy, Spain and Sweden and € 16.95 to other EU countries. In-stock items ordered before 2 pm are dispatched the same working day; delivery usually takes 3–5 working days. Details: Shipping.
I have a fault code, which part do I need?
Look up the code in the fault code finder: per brand and appliance it shows what the code means and which part goes with it. If the code is listed with this part, the part belongs to that fault.
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