Vaillant
Vaillant Fuse 5X20 4A F4-F7 (PK 5) 0020185728
Vaillant 5x20 mm 4 A fuse for F4-F7 positions on Ecotec and Ecotec PLUS boilers, supplied in a pack of five.
At a glance
- Also known as 1392446
£12.73
£10.61 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 0020185728 is a 5x20 mm cartridge fuse rated at 4 A, used in the F4 to F7 fuse positions on Vaillant Ecotec and Ecotec PLUS condensing boilers. It protects the low-voltage control circuits on the appliance PCB, so a blown fuse will typically stop the boiler from running or firing. It is supplied as a pack of five.
Signs this part needs replacing
- The boiler is completely dead with no display or response at the controls
- The fuse shows a visible break in the element, blackening or scorch marks
- A continuity test across the fuse reads open circuit
- The boiler fails to fire or drops out shortly after power-up
- A replacement fuse blows again as soon as power is restored, pointing to a fault elsewhere in the circuit
Before you order
- Confirm the failed fuse is in one of the F4 to F7 positions and matches the 5x20 mm, 4 A rating
- Check the appliance model against the fitment list above before ordering
- Isolate the electrical supply and follow the manufacturer's instructions before opening the appliance
- If a replacement fuse blows immediately, investigate the underlying fault rather than fitting further fuses
Compliance
| Alternative numbers | 1392446 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VAILLANT ecoTEC 610 VU 10 CS/1-5 (2023) | 41-694-45 | 41-694-45 | — | — |
| VAILLANT ecoTEC 615 VU 15 CS/1-5 (2023) | 41-694-46 | 41-694-46 | — | — |
| VAILLANT ecoTEC 620 VU 20 CS/1-5 (2023) | 41-694-47 | 41-694-47 | — | — |
| VAILLANT ecoTEC 625 VU 25 CS/1-5 (2023) | 41-694-48 | 41-694-48 | — | — |
| VAILLANT ecoTEC 630 VU 30 CS/1-5 (2023) | 41-694-49 | 41-694-49 | — | — |
| VAILLANT ecoTEC 635 VU 35 CS/1-5 (2023) | 41-694-50 | 41-694-50 | — | — |
| VAILLANT ecoTEC PLUS 826 VUW 20/26 CS/1-5 (2023) | 47-044-92 | 47-044-92 | — | — |
| VAILLANT ecoTEC PLUS 832 VUW 25/32 CS/1-5 (2023) | 47-044-93 | 47-044-93 | — | — |
| VAILLANT ecoTEC PLUS 836 VUW 30/36 CS/1-5 (2023) | 47-044-94 | 47-044-94 | — | — |
| VAILLANT ecoTEC PLUS 840 VUW 30/40 CS/1-5 (2023) | 47-044-95 | 47-044-95 | — | — |
Showing 10 of 11 compatible appliances.
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 — ecoTEC 610 VU 10 CS/1-5 (2023) (GC 41-694-45), ecoTEC 615 VU 15 CS/1-5 (2023) (GC 41-694-46), ecoTEC 620 VU 20 CS/1-5 (2023) (GC 41-694-47), ecoTEC 625 VU 25 CS/1-5 (2023) (GC 41-694-48), ecoTEC 630 VU 30 CS/1-5 (2023) (GC 41-694-49), ecoTEC 635 VU 35 CS/1-5 (2023) (GC 41-694-50), ecoTEC PLUS 826 VUW 20/26 CS/1-5 (2023) (GC 47-044-92), ecoTEC PLUS 832 VUW 25/32 CS/1-5 (2023) (GC 47-044-93), ecoTEC PLUS 836 VUW 30/36 CS/1-5 (2023) (GC 47-044-94), ecoTEC PLUS 840 VUW 30/40 CS/1-5 (2023) (GC 47-044-95)
manualmanualVAILLANT appliance manual — ecoTEC PLUS 940 VUI 30/40 CS/1-5 (2023) (GC 47-044-96)
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