Boiler repair cost (UK, 2026)
£150 to £450
typical repair, typical UK range, 2026
Most common boiler repairs (ignition parts, sensors, diverter valves, pumps) land between £150 and £450 including parts.
Big-ticket failures like a main heat exchanger can exceed £500, at which point repair vs replace becomes a real question, especially past ten years old.
These are honest typical ranges, not promises: your job, your area and access all move the number. Use them to sanity-check quotes, then get itemised ones.
What moves the price
- The part that failed (a sensor is cheap, a heat exchanger is not)
- Boiler brand and age (obsolete parts cost more and take longer)
- Emergency same-day vs booked visit
- Region (London premium is real)
A fair quote includes
- A diagnosis you can understand before work starts
- Itemised parts and labour, VAT position stated
- The replaced part shown or offered to you
- A workmanship guarantee in writing (12 months is common)
Ask these before you say yes
- 1.What exactly failed, and can you show me?
- 2.Is this repair worth it against the boiler's age, honestly?
- 3.What guarantee comes with the part and the labour?
Worth a second look if
- Condemning the boiler within minutes without a measurable reason
- Cash-only, no written quote
- A quote that is just one round number with no breakdown
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