Every year we service boilers that haven't been touched in 3, 5, or even 10 years. Here's what we typically find — and what it costs.
Efficiency loss
An unserviced burner accumulates carbon deposits that reduce combustion efficiency. A typical 5% efficiency loss on a £1,100 gas bill costs £55/year — equivalent to the service cost each year.
Voided warranty
Most manufacturer warranties require annual servicing to remain valid. A single heat exchanger claim under warranty is worth £300–£600. That alone covers 4–8 years of annual services. An unserviced boiler that develops a sludge-related fault will have the warranty claim rejected.
Safety risks
The engineer's combustion analysis checks for unsafe CO levels in flue gases — a sign of incomplete combustion. An unserviced boiler with a cracked heat exchanger can leak carbon monoxide into the home. CO is odourless and kills around 40 people per year in the UK.
What we find on neglected boilers
- Blocked condensate traps (cause intermittent lockouts)
- Corroded electrodes (cause ignition failures)
- Scaled heat exchangers (reduce efficiency by 15–20%)
- Debris in magnetic filters (circulating and damaging the heat exchanger)
Book your service with us — £79 in Corby and surrounding areas. Contact us to book.