Boiler losing pressure in Ongar? Boiler repairs sorted properly
If you're topping up your boiler in Ongar every week or two, you have a system leak — usually small and hidden. We pressure-test the system, locate the source and fix it properly so you stop refilling. Most Ongar 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 Ongar
Not a national chain — your local engineer, your local prices.
If you're topping up your boiler in Ongar every week or two, you have a system leak — usually small and hidden. We pressure-test the system, locate the source and fix it properly so you stop refilling. Most Ongar repair callouts we diagnose and fix on the first visit — common parts (PRVs, diverters, pumps, PCBs) live on the van.
What happens when you book boiler repairs with us
Fast response
Same-day where possible — especially for vulnerable customers or no-heat in winter.
Honest diagnosis
If your boiler is past saving, we'll tell you. We won't sell you a £400 repair on a 16-year-old unit.
Repair, replace, or part-exchange
Three options where appropriate, with honest cost/benefit on each.
Aftercare
We log the repair, register the parts warranty, and give you a service reminder.
About Ongar
Period centre, mixed-age outskirts, and rural off-grid hamlets.
- LPG and oil boiler servicing on the rural fringe
- Conservation-area flue planning
- Listed property compliance
Ongar homeowners trust us for boiler repairs — here's why
Our boiler repairs work in Ongar is built around three things: doing it properly, charging fairly, and being there afterwards if you need us.
That last bit matters — a lot of installers vanish the moment the invoice clears. We don't.
If something plays up in the first year, we come back and sort it. No quibbles, no callout fee.
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 moreboiler repairs in Ongar: questions we get a lot
How often should I need to top up?▾
A healthy sealed system should hold pressure for 6-12 months between top-ups. Anything more frequent points to a leak.
Could it be the expansion vessel?▾
Yes — a perished expansion vessel inside the boiler is a common cause. We test the vessel as part of diagnosis.
Is it worth repairing an old boiler?▾
Honest answer: if it's over 12 years old and the repair is more than £400, replacement usually makes more financial sense. We'll lay out both options without pressure.
Do you charge a callout fee?▾
We charge a clear diagnostic fee (told to you upfront before we attend). It covers proper on-site diagnosis. The repair itself is then quoted as a fixed price you agree before any work starts.
What you get when you book us
- Vulnerable household priority response
- 12-month repair guarantee
- Fixed price before any work starts
- Stocked van — most repairs done first visit
- All major brands — Worcester, Vaillant, Ideal, Baxi, Glow-worm
Our other services for Ongar homes
Boiler installs in Ongar
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 Ongar
Annual servicing keeps your boiler safe, efficient, and your manufacturer warranty valid. Full inspection, combustion analysis, and a written report.
Heating upgrades in Ongar
Cold radiators, noisy systems, sky-high bills? Power flushes, smart thermostats, radiator swaps and full system upgrades that pay for themselves.
Plumbing in Ongar
Everyday plumbing done properly — taps, toilets, leaks, washing machines, showers, outside taps and isolation valves.
At a glance
- Service
- Boiler Breakdowns & Repairs
- Coverage
- Ongar (CM5) 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 Ongar
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 Ongar customers find us for boiler repairs
Same engineer, same fixed pricing — different question, different answer.
Villages near Ongar we also cover
Stop the pressure drop in Ongar
Free written quote, no obligation. Real engineer, fixed price, fast response.