Low pressure in Great Dunmow? Boiler repairs sorted properly
Boiler dropping pressure in Great Dunmow? If you're topping up more than once a month, you have a leak somewhere — often tiny and hidden. We track it down rather than just keep refilling. 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.
Boiler dropping pressure in Great Dunmow? If you're topping up more than once a month, you have a leak somewhere — often tiny and hidden. We track it down rather than just keep refilling. Most Great Dunmow repair callouts we diagnose and fix on the first visit — common parts (PRVs, diverters, pumps, PCBs) live on the van.
About Great Dunmow
Period centre, rural hamlets, and modern family housing on the periphery.
- Listed property heating compliance
- LPG and oil servicing
- Modern combi installs
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 moreLocal, honest boiler repairs for Great Dunmow homes
We've been doing boiler repairs in Great Dunmow long enough to know which streets have shared chimneys, which estates have undersized gas supplies, and which boilers tend to fail first.
That experience means we get the spec right at the survey, not halfway through the install.
And we don't cut corners on the bits you can't see — proper pipework, magnetic filter, full system flush where needed.
What to expect on a boiler repairs job in Great Dunmow
Phone diagnosis
Quick chat first — sometimes we can talk you through a reset and save you the callout.
On-site diagnosis
Fixed diagnostic fee (told to you upfront). We find the actual fault, not guess.
Fixed repair price
You get a fixed quote before any tools come out. No 'while I'm here' surprises.
Repair & test
Fixed, tested, pressure checked, and we make sure it stays fixed before we leave.
boiler repairs in Great Dunmow: questions we get a lot
Is it dangerous to keep topping up?▾
Not immediately — but the cause needs finding. Repeated top-ups mean fresh oxygenated water keeps entering the system, which corrodes radiators and pumps from the inside.
Where do hidden leaks usually hide?▾
Pressure relief valve discharging outside, perished pump seals, pinhole leaks at radiator valves, or a failing expansion vessel. Each one has a different fix.
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.
Do you guarantee repairs?▾
Yes — 12 months on the workmanship and any parts we supply.
What you get when you book us
- Real human on the phone, not an answering service
- Honest 'is it worth fixing?' advice
- Stocked van — most repairs done first visit
- 12-month repair guarantee
- All major brands — Worcester, Vaillant, Ideal, Baxi, Glow-worm
Other plumbing & heating work we do 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.
Our coverage around Great Dunmow
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
Fix the pressure drop in Great Dunmow
Free written quote, no obligation. Real engineer, fixed price, fast response.