Fast, Honest Boiler Repair Across Doncaster

When your boiler stops working — no heat, no hot water, leaking pressure, error code on the display — you want one thing: someone who can show up today, tell you honestly what's wrong, and fix it for a fair price. That's what we do. Yorkshire Green Heating has been repairing boilers across Doncaster, Bessacarr, Bawtry, Tickhill, Thorne and the wider DN postcodes for over a decade, and our 597 Checkatrade reviews at 9.84/10 reflect how we work: turn up when we say we will, diagnose properly, quote a fixed price in writing, fix it cleanly.

We're a small, family-run, Gas Safe registered team (registration 638592) — not a national franchise that subcontracts the work. The engineer who quotes is the engineer who fixes.

Same-Day Emergency Boiler Repair

If you've got no heating or no hot water, call us on 01302 963007. We prioritise emergency boiler call-outs and aim to be on site the same day or first thing next morning. Most common faults — diverter valves, expansion vessels, pressure sensors, fan motors, PCBs, diaphragms — we can diagnose in 30–60 minutes and often have the part on the van or available the same day.

If you smell gas, call the National Gas Emergency line on 0800 111 999 first, then us.

What We Repair

We work on every major boiler brand including Worcester Bosch, Vaillant, Ideal, Baxi, Glow-worm, Viessmann, Potterton, Vokera and more. Common faults we fix routinely across Doncaster homes:

  • Pressure loss / boiler losing pressure overnight — usually an expansion vessel, PRV (pressure relief valve), or a leak somewhere in the system
  • No hot water (heating still working) — typically a failed diverter valve
  • No heating and no hot water — could be a stuck pump, sticky diverter, PCB fault, or low pressure
  • F-codes / error codes on the display — each brand has its own fault codes; we know what they mean and what they actually cost to fix (not always what the code suggests)
  • "Kettling" / banging / knocking noises — often limescale build-up on the heat exchanger (very common in Doncaster's hard-water area), sometimes a faulty pump
  • Pilot light keeps going out — typically a thermocouple or flame sensor
  • Boiler keeps cutting out / short-cycling — could be a temperature sensor, gas valve, or system flow issue
  • Leaking boiler — diagnose the source first, never just patch over
  • Fan / flue fault — fans are common after 7–10 years of use
  • Frozen condensate pipe — winter classic, often a free fix on a call-out

2026 Doncaster Repair Prices — Honest Ranges

We give every customer a fixed-price written quote before any work starts. Here are the ranges to expect from a Gas Safe engineer being honest with you:

  • Diagnostic call-out (first hour): £80–£120 inc VAT, credited against the repair if you go ahead
  • Diverter valve replacement: £180–£280 fitted
  • Expansion vessel replacement: £150–£240 fitted
  • Pressure sensor / PRV: £120–£180 fitted
  • Pump replacement: £220–£360 fitted
  • PCB (printed circuit board): £350–£650 fitted, depending on brand
  • Fan / flue gas analyser: £280–£420 fitted
  • Heat exchanger: £700–£1,100 fitted — at this price, always think about whether replacement is the better call (see our repair-or-replace guide)
  • Frozen condensate / minor unblock: often free as part of the call-out

Repair or Replace? The Rule of Thirds

If a single repair would cost more than one third of a new boiler, replacement is usually the better long-term call. A typical mid-range new combi in Doncaster is £2,400–£3,000 fully fitted, so any single repair above ~£800 is worth running through the rule of thirds. The full version of that decision framework — including the five honest questions every Gas Safe engineer should ask before quoting either way — is in our repair-or-replace guide.

If you'd rather a new install, see our boiler installation page for fitted pricing and the brands we recommend.

Why Choose Us for a Boiler Repair

Same-day call-outs. We prioritise emergency repairs and most call-outs get attended within 24 hours.

Fixed-price quotes. The price you sign is the price you pay. No "the job turned out to be bigger than I thought" surprises.

Honest advice. Sometimes the right answer is repair. Sometimes it's replace. We'll tell you straight, including running the rule of thirds out loud so you can see the maths.

Gas Safe registered & insured. Registration 638592, City & Guilds Level 3 qualified, fully insured.

9.84/10 from 597 Checkatrade reviews. Real Doncaster customers, real reviews, real photos of completed work.

No call-out tricks. The diagnostic fee is credited if you go ahead. No "minimum charge" gotchas.

Areas We Cover for Boiler Repair

We cover all of Doncaster town centre and every surrounding DN postcode including Bessacarr, Bawtry, Tickhill, Thorne, Rossington, Armthorpe, Bentley, Mexborough, Conisbrough, Cantley, Hatfield, Hexthorpe, and Balby. We also work in parts of Sheffield, Rotherham and the wider South Yorkshire area on request.