Vaillant
Vaillant Flow Switch 0020127211
Flow switch for Vaillant VWL 45/1 A 230V and Geotherm VWL 45/1 A 230V heat pumps, part number 0020127211.
At a glance
- Appliance family: VWL 45/1 A 230V heat pump
- Also known as 1385822
£233.11
£194.26 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 0020127211 is a flow switch used in Vaillant heat pump appliances. It detects water flow through the heating circuit and signals the appliance control board, so the unit only runs when flow is present. It is listed for the VWL 45/1 A 230V and Geotherm VWL 45/1 A 230V.
Signs this part needs replacing
- Appliance locks out or fails to start with the circulation pump running
- Flow-related fault codes shown on the appliance control panel
- Intermittent running or short cycling during a demand
- Heating or hot water demand not being satisfied
- Pump runs continuously without the appliance responding
Before you order
- Check the model and serial number on the appliance data badge against the fitment list.
- Verify pump operation and wiring before condemning the switch.
- Compare the part number on the existing component with 0020127211.
Compliance
| Alternative numbers | 1385822 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VAILLANT VWL 45/1 A 230V | — | — | — | |
| VAILLANT geoTHERM VWL 45/1 A 230V | — | — | — |
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.
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