Plumbing, Heating & Boiler Parts
Technical review: 2026-08-20
Vaillant Boiler Spares & Replacement Parts
Source genuine Vaillant replacement spares for ecoTEC plus, ecoTEC pro, and ecoFIT domestic heating systems across the UK.
Where to Find Your Model or Part Number
To guarantee 100% compatibility, check these standard locations for model badges, OEM stampings, and serial numbers:
- Gas Council number and serial badge on bottom panel or behind the front magnetic door.
Frequently Replaced Components & Spares
Common Symptoms & Fault Diagnostics
| Observed Symptom | Likely Root Cause | Recommended Action |
|---|---|---|
| F.28 or F.75 error code on Vaillant ecoTEC display | F.28 = Ignition failure; F.75 = Water pressure sensor not detecting pump pressure jump | Inspect and replace faulty component. |
Compatibility Verification Checklist
Before ordering replacement components, verify these technical specifications to avoid returns:
Verify if boiler is ecoTEC generation 1 (2005-2012) or generation 2 (2012+).
How to Photograph Your Part for AI Identification
- 1Photograph the Vaillant serial plate with barcode.
Safety & Legal Compliance Notice
All gas appliance work in the UK requires a registered Gas Safe engineer.