Vaillant
Vaillant Expansion Valve 0020192789
Vaillant 0020192789 expansion valve, 5K variant, for Arotherm and VWL heat pump models.
At a glance
- Also known as 1386570
£75.02
£62.52 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 0020192789 is an expansion valve supplied in the 5K variant. It sits in the refrigerant circuit of Vaillant air source heat pumps, where it controls the flow and expansion of refrigerant between the high and low pressure sides of the system. It is used across the Arotherm and VWL heat pump families listed below.
Signs this part needs replacing
- Heating or hot water output drops below the expected level for the appliance
- The outdoor unit pipework shows frosting or ice build-up that does not clear during defrost
- Refrigerant pressure or superheat related fault codes appear on the appliance controls
- The compressor cycles on and off more frequently than normal
- Abnormal noise from the expansion valve area during running
Before you order
- Confirm the appliance model and variant against the fit list above
- Check the part number on the existing valve matches 0020192789
- Confirm whether the appliance is an S2, S2 R1 or earlier build, as listed in the fitment data
- Work on the refrigerant circuit requires the correct handling and recovery equipment
Compliance
| Alternative numbers | 1386570 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VAILLANT VWL 55/2 A 230V | — | — | — | |
| 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 VWL 55/2 A 230V (2014) | — | — | — |
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 — VWL 55/2 A 230V, aroTHERM VWL 55/2 A 230V (2014)
manualmanualVAILLANT appliance manual — aroTHERM 5/5 VWL 35/5 AS 230V S2 (2019-2022), aroTHERM 5/5 VWL 35/5 AS 230V S2 R1 (2019-2022), aroTHERM 5/5 VWL 55/5 AS 230V S2 (2019-2022), aroTHERM 5/5 VWL 55/5 AS 230V S2 R1 (2019-2022)
manualNo technical questions yet for this part.
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