Vaillant
Vaillant Heat Exchanger 12 Plates 0020211942
Vaillant 0020211942 12-plate heat exchanger for HOME Combi and Ecofit PURE/Sustain 825 gas boilers.
At a glance
- Also known as 1388056
£109.68
£91.40 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 0020211942 is a 12-plate heat exchanger used in Vaillant gas boilers. It transfers heat between the primary circuit and the domestic hot water circuit, so it sits at the centre of hot water production on combi appliances. The plate stack is built to the manufacturer's specification for the models listed below.
Signs this part needs replacing
- Domestic hot water runs hot then cold, or the temperature swings as the tap is used
- Hot water output is weaker than it should be at a given flow rate
- Water weeping or staining around the plate stack or its connections
- The plate pack is scaled or sludged, with poor heat transfer after flushing
- Repeated lockouts or temperature faults traced to a restricted heat exchanger
Before you order
- Check the model and GC number on the appliance data badge against the fit list above
- Confirm the existing heat exchanger is a 12-plate unit before ordering
- Inspect the connections and seals on the appliance for damage or scale
- Confirm the fault is with the heat exchanger and not the diverter valve or sensor circuit
Compliance
| Alternative numbers | 1388056 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VAILLANT HOME COMBI 25 -A | 47-044-62 | 47-044-62 | — | — |
| VAILLANT HOME COMBI 30 -A | 47-044-63 | 47-044-63 | — | — |
| VAILLANT HOME COMBI 35 -A | 47-044-64 | 47-044-64 | — | — |
| VAILLANT ecoFIT PURE 825 - VUW 256/6-3 (2016) | 47-044-68 | 47-044-68 | — | — |
| VAILLANT ecoFIT SUSTAIN 825 - VUW 256/6-3 (2016) | 47-044-71 | 47-044-71 | — | — |
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 — HOME COMBI 25 -A (GC 47-044-62), HOME COMBI 30 -A (GC 47-044-63), HOME COMBI 35 -A (GC 47-044-64)
manualmanualVAILLANT appliance manual — ecoFIT PURE 825 - VUW 256/6-3 (2016) (GC 47-044-68)
manualmanualVAILLANT appliance manual — ecoFIT SUSTAIN 825 - VUW 256/6-3 (2016) (GC 47-044-71)
manualNo technical questions yet for this part.
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