Top 5 Reasons to Service Annually
1. Safety - Carbon Monoxide Risk
Faulty boilers produce carbon monoxide - a silent killer causing 60 deaths per year in the UK.
Annual servicing checks:
- Flame color and combustion
- Ventilation and flue integrity
- Gas pressure and burner condition
- CO levels with analyzer
2. Maintain Warranty
All boiler warranties require annual servicing by a Gas Safe engineer.
With annual service:
- Warranty remains valid
- Free parts replacement
- Labor costs covered
Without service:
- Warranty void immediately
- Pay for all repairs
- £200-800 per breakdown
Example: Service costs £90. Heat exchanger replacement costs £600. Service is worth it!
3. Lower Energy Bills
Serviced boilers run 15-20% more efficiently, saving £150-200/year on typical UK household.
| Boiler Condition | Efficiency | Annual Cost |
|---|---|---|
| Regularly serviced | 90-94% | £1,000 |
| Not serviced 2+ years | 75-85% | £1,200 |
| Never serviced (5+ years) | 60-70% | £1,400+ |
ROI: Service costs £90, saves £200/year = profit of £110!
4. Prevent Breakdowns
70% of boiler breakdowns are preventable with regular servicing.
Common issues caught during service:
- Worn pump bearings (before complete failure)
- Early limescale buildup (before kettling)
- Pressure vessel losing charge
- Electrodes deteriorating
- Seals starting to leak
Winter fact: 80% of breakdowns occur December-February. Summer servicing prevents winter misery!
5. Extend Boiler Lifespan
With Annual Service
15 years
Average lifespan
Without Service
8-10 years
Average lifespan
Savings: Extending boiler life by 5 years = £2,500 saved on premature replacement
What's Included in Annual Service
Visual Inspection
- Check for leaks and corrosion
- Inspect casing and seals
- Examine flue and ventilation
- Look for error codes
Component Checks
- Test ignition and flame
- Check pump operation
- Verify safety devices
- Inspect heat exchanger
Performance Tests
- Gas pressure measurement
- Combustion analysis
- CO levels check
- Efficiency rating
Cleaning & Maintenance
- Clean burner and ignition
- Clear condensate trap
- Remove dust and debris
- Lubricate moving parts
Service Costs 2025
| Service Type | What's Included | Price |
|---|---|---|
| Basic Service | Standard checks, no repairs | £70-90 |
| Full Service | Complete check + minor adjustments | £90-120 |
| Service + Certificate | Landlord CP12 included | £120-150 |
When to Book Your Service
Best Time to Book
Summer (June-August) is ideal:
- Engineers less busy - more appointment slots
- Better prices (avoid winter premium)
- Issues fixed before winter heating season
- No cold weather disruption if repairs needed
Pro tip: Book 11 months after last service to stay within warranty requirements