Vaillant
Vaillant Thermostat 0020127154
Vaillant thermostat, part number 0020127154, for geoTHERM VWL 45/1, 65/1 and 75/1 A 230V heat pumps.
At a glance
- Appliance family: geoTHERM VWL
- Also known as 1385131
£26.10
£21.75 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
This is a thermostat manufactured by Vaillant, carrying part number 0020127154. It is used on the Vaillant geoTHERM VWL range of air-to-water heat pumps running on a 230V supply. The thermostat provides temperature sensing and switching control within the appliance's heating circuit.
Signs this part needs replacing
- The heat pump fails to reach or hold the set flow temperature.
- Heating output cycles on and off more frequently than normal.
- The appliance locks out or reports a temperature-related fault.
- Measured flow and return temperatures do not match the values shown on the controls.
- The system runs continuously or not at all, with no response to setpoint changes.
Before you order
- Confirm the model number on the appliance data plate matches one of the fitments listed above.
- Check the existing thermostat's part number against 0020127154 before removal.
- Isolate the power supply to the heat pump before opening any panel or replacing components.
- Verify the fault is with the thermostat itself and not with the sensor wiring or control board.
Compliance
| Alternative numbers | 1385131 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VAILLANT VWL 45/1 A 230V | — | — | — | |
| VAILLANT VWL 65/1 A 230V | — | — | — | |
| VAILLANT VWL 75/1 A 230V | — | — | — | |
| VAILLANT geoTHERM VWL 45/1 A 230V | — | — | — | |
| VAILLANT geoTHERM VWL 65/1 A 230V | — | — | — | |
| VAILLANT geoTHERM VWL 75/1 A 230V | — | — | — | |
| VAILLANT geoTHERM VWL 75/1 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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