No hot water in Great Dunmow? Boiler repairs sorted properly
No hot water but heating still works? On a combi, that's almost always a diverter valve, diaphragm or PCB issue. We carry the common parts, diagnose on-site and usually get it fixed in one visit across Great Dunmow. Most Great Dunmow repair callouts we diagnose and fix on the first visit — common parts (PRVs, diverters, pumps, PCBs) live on the van.
You're not getting a call centre — you're getting Grant.
The same engineer quotes the job, does the work, and answers the phone afterwards if anything's not right.
Gas Safe Registered
Every gas job legally signed off
18+ years on the tools
Grant has been fixing boilers in Harlow since before smart thermostats existed.
Real human on the phone
Most calls answered the same day, often within the hour.
Locally based in Great Dunmow
Not a national chain — your local engineer, your local prices.
No hot water but heating still works? On a combi, that's almost always a diverter valve, diaphragm or PCB issue. We carry the common parts, diagnose on-site and usually get it fixed in one visit across Great Dunmow. Most Great Dunmow repair callouts we diagnose and fix on the first visit — common parts (PRVs, diverters, pumps, PCBs) live on the van.
What's included
No Hot Water Repair
Diverter valves, diaphragms, PCBs — the common combi hot water faults.
Learn moreNo Heating Repair
Pump faults, airlocks, frozen condensates — getting heat back on quickly.
Learn moreLeaking Boiler Repair
Pressure valves, heat exchangers, pump seals — sealing leaks safely.
Learn moreBoiler Fault Code Diagnosis
F1, F22, EA, A01 — translating fault codes into real fixes.
Learn moreAbout Great Dunmow
Period centre, rural hamlets, and modern family housing on the periphery.
- Listed property heating compliance
- LPG and oil servicing
- Modern combi installs
How we handle boiler repairs in Great Dunmow
We pick up
Real person, not an answering service. We give you an honest arrival window.
We diagnose properly
Combustion analyser, multimeter, pressure gauges — proper diagnostic kit, not guesswork.
You get a price
Written, fixed, agreed before we proceed. Walk away free if you'd rather.
We fix it & guarantee the work
12-month guarantee on the repair. If the same fault comes back, we come back.
Our approach to boiler repairs in Great Dunmow
When you book us for boiler repairs in Great Dunmow, you get a real, named engineer turning up — not a sub-contractor.
We know the housing in Great Dunmow and what tends to go wrong with it, which means fewer surprises mid-job.
Fixed prices in writing before any work starts. The number you agree is the number you pay.
What you get when you book us
- All major brands — Worcester, Vaillant, Ideal, Baxi, Glow-worm
- Same-day response wherever possible
- Real human on the phone, not an answering service
- Fixed price before any work starts
- Honest 'is it worth fixing?' advice
Things Great Dunmow customers usually ask about boiler repairs
Why have I lost hot water but heating still works?▾
On a combi boiler this is the classic diverter valve symptom — the valve that switches the flame between heating and hot water has stuck. Common, and usually a one-visit fix.
How much will it cost?▾
Diverter valve replacement on most boilers is £180–£320 fitted. We'll give you a fixed price after diagnosis before any work starts.
Do you guarantee repairs?▾
Yes — 12 months on the workmanship and any parts we supply.
How fast can you come out?▾
We aim for same-day on no-heat and no-hot-water situations. Tell us when you call if anyone elderly or with young children is in the property — we prioritise.
Where else we work near Great Dunmow
Related services in Great Dunmow
Boiler installs in Great Dunmow
Worcester, Vaillant, Ideal and Glow-worm boilers fitted by Gas Safe registered engineers — sized properly, fitted neatly, and backed by manufacturer warranties of up to 12 years.
Boiler servicing in Great Dunmow
Annual servicing keeps your boiler safe, efficient, and your manufacturer warranty valid. Full inspection, combustion analysis, and a written report.
Heating upgrades in Great Dunmow
Cold radiators, noisy systems, sky-high bills? Power flushes, smart thermostats, radiator swaps and full system upgrades that pay for themselves.
Plumbing in Great Dunmow
Everyday plumbing done properly — taps, toilets, leaks, washing machines, showers, outside taps and isolation valves.
At a glance
- Service
- Boiler Breakdowns & Repairs
- Coverage
- Great Dunmow (CM6) and surrounding areas
- Response time
- Usually within 24–48 hours
- Credentials
- Gas Safe registered, fully insured, 12-month workmanship guarantee
- Pricing
- Fixed written quotes, no surprise extras
Roughly what you'll pay in Great Dunmow
These are honest starting prices for jobs we do every week. Final quote depends on your property — we'll always confirm in writing before any work starts. No surprise add-ons.
| Job | Price |
|---|---|
Diagnostic call-out first hour on-site, transparent before any parts | from £85 |
Common parts (PCB, fan, pump) fitted same-visit where possible | £140–£380 |
No-heat / no-hot-water emergency same-day priority slot | from £120 |
Quote over the phone send a photo of the fault code | free |
Prices include VAT. Parts quoted separately and shown on your written quote.
Other ways Great Dunmow customers find us for boiler repairs
Same engineer, same fixed pricing — different question, different answer.
Villages near Great Dunmow we also cover
Hot water sorted in Great Dunmow
Free written quote, no obligation. Real engineer, fixed price, fast response.