Vaillant
Vaillant Wiring Harness Pro 0020221619
Wiring harness for the Vaillant VUW 306/5-3 R4 boiler, part number 0020221619.
At a glance
- Also known as 1388118
Showing prices
£28.57
£23.81 ex. VAT · VAT at 20%
Available to order · 7 working days
Available to order · 7 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
Wiring harness manufactured by Vaillant for the VUW 306/5-3 R4 boiler. It carries electrical connections between components within the appliance. Part number 0020221619.
Signs this part needs replacing
- Intermittent electrical faults or the boiler failing to fire
- Error codes linked to component communication or sensor signals
- Visible damage to the harness, such as chafed, cracked or burnt insulation
- Loose, corroded or discoloured connectors
- Components working intermittently when the harness is moved
Before you order
- Confirm your boiler model is the Vaillant VUW 306/5-3 R4
- Check the part number 0020221619 against the existing harness or the manufacturer's parts list
- Inspect the existing harness connectors and routing before ordering
- Work on the appliance should be carried out by a competent heating engineer
Compliance
| Alternative numbers | 1388118 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VAILLANT VUW 306/5-3 R4 | 47-044-52 | 47-044-52 | — | — |
Fitment listings are a guide, not a guarantee. Plant-room assemblies get modified on site more often than not. Send us the GC number off the data badge and a photo of the existing valve and we will confirm before anything is dispatched.
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.
Not sure which part?
Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.