Vaillant
Vaillant DHW Heat Exchanger 18 Plates 0020231140
18-plate domestic hot water heat exchanger for Vaillant Ecofit PURE 835 and Ecofit Sustain 835 boilers.
At a glance
- Also known as 1388206
£111.43
£92.86 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 0020231140 is an 18-plate domestic hot water (DHW) heat exchanger used in the Ecofit PURE and Ecofit Sustain boiler families. It transfers heat from the primary circuit to the domestic hot water supply, so the plate stack and its channel spacing directly affect hot water output and temperature stability.
Signs this part needs replacing
- Domestic hot water runs lukewarm or the temperature fluctuates at the tap
- Reduced hot water flow rate compared with normal operation
- Boiler fires on a DHW demand but the water stays cold
- Scale or debris restricting the plate channels
- Water weeping from the plate stack or its connections
Before you order
- Confirm the boiler model and GC number against the fitment list
- Check the existing heat exchanger is an 18-plate unit
- Inspect the connections and seals for damage before fitting
- Confirm part number 0020231140 against the manufacturer's parts list
Compliance
| Alternative numbers | 1388206 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VAILLANT ecoFIT PURE 835 - VUW 356/6-3 (2016) | 47-044-70 | 47-044-70 | — | — |
| VAILLANT ecoFIT SUSTAIN 835 - VUW 356/6-3 (2016) | 47-044-73 | 47-044-73 | — | — |
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.
No technical questions yet for this part.
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