Vaillant
Vaillant Thermostat Immersion Heater and Solar 0020236129
Vaillant thermostat for immersion heater and solar applications, part number 0020236129.
At a glance
- Also known as 1388320
£69.18
£57.65 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 0020236129 is a thermostat intended for immersion heater and solar applications. It is a control component used within Vaillant hot water cylinder and solar thermal assemblies. The thermostat regulates the stored water temperature by switching the heating source according to the sensed temperature.
Signs this part needs replacing
- Stored water temperature is consistently too hot or too cold against the set point.
- The cylinder fails to reach temperature, or the heating source does not switch off at the set point.
- Erratic temperature swings in the hot water supply.
- Fault codes or lockouts relating to cylinder temperature sensing.
- Visible damage, corrosion or a loose or degraded capillary/connection at the thermostat.
Before you order
- Confirm the appliance model and variant against the fit list above.
- Check the existing thermostat's part number and connection arrangement before removal.
- Isolate the electrical supply and drain or depressurise the cylinder as required before fitting.
- Verify the thermostat is suited to the immersion heater or solar circuit being worked on.
Compliance
| Alternative numbers | 1388320 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VAILLANT VANTAGE VIH GB 120/3 BES | — | — | — | |
| VAILLANT VANTAGE VIH GB 150/3 BES | — | — | — | |
| VAILLANT VANTAGE VIH GB 180/3 BES | — | — | — | |
| VAILLANT VANTAGE VIH GB 200/3 BES | — | — | — | |
| VAILLANT VANTAGE VIH GB 250/3 BES | — | — | — | |
| VAILLANT VANTAGE VIH GB 300/3 BES | — | — | — | |
| VAILLANT VANTAGE VIH S GB 200/3 BES | — | — | — | |
| VAILLANT VANTAGE VIH S GB 250/3 BES | — | — | — | |
| VAILLANT VANTAGE VIH S GB 300/3 BES | — | — | — | |
| VAILLANT VANTAGE VIH SW GB 500 BES | — | — | — |
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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.
VAILLANT appliance manual — VANTAGE VIH GB 120/3 BES, VANTAGE VIH GB 150/3 BES, VANTAGE VIH GB 180/3 BES, VANTAGE VIH GB 200/3 BES, VANTAGE VIH GB 250/3 BES, VANTAGE VIH GB 300/3 BES, VIH GB 120/3 BES, VIH GB 150/3 BES, VIH GB 180/3 BES, VIH GB 200/3 BES, VIH GB 250/3 BES, VIH GB 300/3 BES
manualmanualVAILLANT appliance manual — VANTAGE VIH S GB 200/3 BES, VANTAGE VIH S GB 250/3 BES, VANTAGE VIH S GB 300/3 BES, VIH S GB 200/3 BES, VIH S GB 250/3 BES, VIH S GB 300/3 BES
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