An annual boiler service in Leeds costs £75 to £100 for a domestic combi. It takes 45 minutes to an hour and is legally required if you are a landlord, contractually required for your manufacturer warranty, and just sensible if you own the property. Here is what you actually get for the money.

Standard pricing in 2026

  • Combi boiler service: £85
  • System boiler with separate cylinder: £110
  • Combined boiler service + landlord gas safety certificate (CP12): £125
  • Multiple boilers same visit (HMO or landlord portfolio): 15% discount per unit

What a proper service includes

Visual inspection

  • Check flue routing, seals, and terminal for correct fitting and no damage
  • Boiler casing check for corrosion or damage
  • Isolation valves working
  • Condensate drain flow

Combustion analysis

  • Flue gas analyser test on the running boiler
  • Check CO/CO2 ratio is within manufacturer spec
  • Adjust burner if out of tolerance

Component checks

  • Ignition and flame stability
  • System pressure and expansion vessel pressure
  • Water quality (using inhibitor test strip)
  • Magnetic filter clean-out if fitted

Safety devices

  • PRV (pressure relief valve) discharge test
  • Flame failure device response time
  • Boiler cycle to full temperature and stable modulation

Documentation

  • Service record sticker on the boiler casing
  • Written report emailed to you
  • For landlords: CP12 (Landlord Gas Safety Certificate)

Why it matters for your warranty

Every major boiler manufacturer (Worcester, Vaillant, Ideal, Baxi, Viessmann) requires annual service by a trusted local engineer for the warranty to remain valid. Miss a year and if the boiler fails, you pay for the parts.

How often do you actually need one?

  • Any warranty period: Every 12 months, no exceptions
  • Landlord: Every 12 months, legally required
  • Owner-occupier, out of warranty: Every 12 to 24 months is best practice; catches issues before they become expensive breakdowns

Red flags for cowboy servicing

  • "Service" that takes 15 minutes: not a real service
  • No flue gas analyser used: not a real service
  • Never removes the casing: not a real service
  • Just fills in a form with no report: not evidence of a service

What if the service reveals a problem?

We tell you honestly, quote for the fix, and it is your call. We do not create work. If your boiler is running clean and just needs another year in service, you are told exactly that.