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Vaillant PCB, HMU
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Vaillant PCB, HMU 0020278881

€ 235.98 incl. VAT

Original spare part Vaillant. Type: PCB. Application: Heat pump / aroTHERM VWL 115/2 A 400V. Supplier code: 0020278881.

SKU: 80501254 Categories: , Brand:

Price and stock checked on 20 October 2026.

✓ In stock — delivery usually within 3–5 working days
EU delivery from € 12.95 · Shipping & payment

Price incl. VAT. Any delivery costs are calculated in the basket — see shipping & delivery.

Does this fit my appliance?
ApplicationHeat pump
Series / modelaroTHERM VWL 55/3 A 230V and 5 other models
Vaillant number0020278881
Article number80501254
Not sure? Search by article or manufacturer number or check with the manufacturer or your installer.
All spare parts for Vaillant aroTHERM VWL 55/3 A 230V →
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 0020278881, this is that part.
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Vaillant PCB, HMU: original Vaillant spare part, type: PCB. Application: Heat pump (aroTHERM VWL 115/2 A 400V). Manufacturer number: 0020278881; Instalpunt article number: 80501254.

According to the Vaillant parts lists, this part fits 6 models, including Vaillant aroTHERM VWL 55/2 A 230V, Vaillant aroTHERM VWL 55/3 A 230V and Vaillant aroTHERM VWL 85/2 A 230V. 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.

Product information: Vaillant PCB, HMU 0020278881

BrandVaillant spare parts
Vaillant manufacturer number0020278881
Instalpunt article number80501254
EAN4024074851418
Part typePCB (All Vaillant PCBs and controls · PCBs and controls of all brands)
ApplicationHeat pump
Suitable for6 Vaillant models (see list)
DeliveryIn stock, delivery in 3–5 working days
Price€ 235.98 incl. VAT
OriginSupplied through the official technical wholesale channel, under Vaillant number 0020278881

Also known as: printplaat, besturingsprint, PCB.

Fits 6 Vaillant models

The part Vaillant PCB, HMU 0020278881 is in the official parts list of these Vaillant appliances. Click a model for the complete parts list and exploded view.

Vaillant Heat pump (6)

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.

For which fault is a Vaillant pcb replaced?

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.

CodeWhat is going on
F.070Replacement of the control PCB and display PCB
F.086Contact 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
F.103Wrong thermostat PCB installed on the outdoor unit
F.194PCB mains adapter defective

All Vaillant fault codes explained

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, HMU 0020278881 fit my appliance?
This part is in the parts list of 6 Vaillant models, namely the aroTHERM VWL 55/2 A 230V, aroTHERM VWL 55/3 A 230V, aroTHERM VWL 85/2 A 230V, aroTHERM VWL 85/3 A 230V, aroTHERM VWL 115/2 A 400V, aroTHERM VWL 155/2 A 400V. The model type is on the rating plate of your appliance. If in doubt, ask the manufacturer or your installer.
What is the delivery time for the Vaillant PCB, HMU 0020278881?
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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