Vaillant
Vaillant Switch High Pressure 0020266435
High pressure switch, part 0020266435, for Vaillant Arotherm 5/5 VWL AS 230V S2 heat pumps.
At a glance
- Also known as 1389024
£58.03
£48.36 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 0020266435 is a high pressure switch used on Vaillant Arotherm 5/5 VWL AS 230V S2 air source heat pumps. It monitors system pressure and signals the control board when pressure rises above the set threshold, allowing the appliance to shut down safely. It is a service component for the Arotherm range.
Signs this part needs replacing
- The heat pump locks out or shuts down with a high pressure fault
- The appliance cuts out repeatedly during operation
- A high pressure fault code returns after resetting the controls
- The switch fails to respond as pressure rises, or trips at the wrong point
- The system runs but the control board reports no pressure signal
Before you order
- Check the appliance data plate against the fit list above
- Confirm the part number on the existing switch matches 0020266435
- Check system pressure readings before condemning the switch
- Isolate the power supply before removing or fitting the component
Compliance
| Alternative numbers | 1389024 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VAILLANT aroTHERM 5/5 VWL 105/5 AS 230V S2 (2019) | — | — | — | |
| VAILLANT aroTHERM 5/5 VWL 125/5 AS 230V S2 (2019) | — | — | — | |
| VAILLANT aroTHERM 5/5 VWL 35/5 AS 230V S2 (2019-2022) | — | — | — | |
| VAILLANT aroTHERM 5/5 VWL 35/5 AS 230V S2 R1 (2019-2022) | — | — | — | |
| VAILLANT aroTHERM 5/5 VWL 55/5 AS 230V S2 (2019-2022) | — | — | — | |
| VAILLANT aroTHERM 5/5 VWL 55/5 AS 230V S2 R1 (2019-2022) | — | — | — | |
| VAILLANT aroTHERM 5/5 VWL 75/5 AS 230V S2 (2022) | — | — | — | |
| VAILLANT aroTHERM 5/5 VWL 75/5 AS 230V S2 R1 (2022) | — | — | — |
Documents & drawings
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