Vaillant
Vaillant Printed Circuit Board HMU Geotherm Mono 0020233803
Vaillant printed circuit board, part number 0020233803, for the HMU on Geotherm Mono heat pump systems.
At a glance
- Also known as 1386950
£266.71
£222.26 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Vaillant 0020233803 is a printed circuit board supplied by Vaillant for the HMU on Geotherm Mono heat pump systems. The board carries the control electronics for the hydraulic management unit, handling the signal and switching functions that the HMU performs within the heating circuit. It is supplied as a board assembly identified by the Vaillant part number 0020233803.
Before you order
- Confirm the part number 0020233803 against the marking on the existing board and the Vaillant documentation for the appliance.
- Check that the board is being fitted to the HMU of a Geotherm Mono system, as indicated by the product name.
- Verify the board's connector layout and mounting arrangement against the unit before removal, so the existing wiring can be reconnected in the same order.
- Isolate the electrical supply to the appliance and follow the manufacturer's instructions for handling static-sensitive circuit boards.
Compliance
| Alternative numbers | 1386950 |
|---|
No fitment data held for this part.
Documents & drawings
Everything we hold for this part. Where a document exists but we don't hold it, the technical team will source it from the manufacturer — usually the same working day.
No documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
No technical questions yet for this part.
Not sure which part?
Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.