Most people know they should service their boiler annually — but many aren't sure what it actually involves or why it matters so much.
What an annual service involves
A thorough boiler service covers 15+ checks, including:
- Gas pressure and flow rate measurement
- Burner inspection and cleaning
- Heat exchanger inspection for cracks or carbon deposits
- Flue analysis — measuring combustion gases including CO
- Safety devices tested (overheat stat, pressure relief valve)
- Fan operation and speed check
- Condensate trap and pipe inspection
- Seals and gaskets inspection
- Complete visual inspection of boiler internals
Why it matters
Safety: A boiler with a cracked heat exchanger can leak carbon monoxide — a colourless, odourless gas that is potentially fatal. Annual servicing catches this before it becomes dangerous.
Efficiency: A dirty burner and heat exchanger can reduce boiler efficiency by 5–10%. Cleaning during servicing restores full performance.
Warranty: Most manufacturer warranties require annual servicing. Skipping a service can invalidate the warranty, leaving you liable for costly repairs.
Longevity: Boilers that are serviced annually consistently last 3–5 years longer than unserviced ones.
How much does a service cost?
An annual boiler service with us costs £79. This includes a full report and your Gas Safe service record stamp. Book online or call 01536 000 000.