Boiler losing pressure in Katherines? Heating upgrades sorted properly
If you're topping up your boiler in Katherines 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. Heating upgrade work in Katherines usually means power-flushing, smart controls, TRVs or radiator replacements — we'll tell you straight which actually move the dial for your system.
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 Katherines
Not a national chain — your local engineer, your local prices.
If you're topping up your boiler in Katherines 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. Heating upgrade work in Katherines usually means power-flushing, smart controls, TRVs or radiator replacements — we'll tell you straight which actually move the dial for your system.
Why choose us for heating upgrades in Katherines
When you book us for heating upgrades in Harlow, you get a real, named engineer turning up — not a sub-contractor.
We know the housing in Harlow 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.
Our heating upgrades process, step by step
Pre-flush check
Radiator survey, pump and motorised valve check, and a sludge sample where possible.
Flush
High-flow magnetic flushing unit run through the system, radiator by radiator, until water runs clear.
Inhibitor & filter
Fresh corrosion inhibitor added; magnetic filter fitted to keep the system clean going forward.
Performance check
Heating fired up, all radiators rebalanced, and the difference measured.
About Katherines
Newer estate on Harlow's western edge with predominantly combi-boilered housing.
Predominantly 1950s–70s post-war housing with a mix of terraces, semis, and 60s-built flats. Pockets of older stock around Old Harlow.
- Original 1960s flats often have undersized gas supply pipes that limit modern combi performance
- Older Old Harlow properties frequently have low mains water pressure that affects combi choice
- Many 60s/70s back boilers still in service — our regular work involves removing these and reinstating fireplaces
What's included
Power Flushing
Deep clean of central heating to remove sludge and restore efficiency.
Learn moreRadiator Replacement & Relocation
Swapping tired old radiators or moving them for new layouts.
Learn moreSmart Thermostat Installation
Hive, Nest, Tado, Honeywell — fitted, set up and explained.
Learn moreMagnetic System Filter Fitting
MagnaClean or Spirotech filters to protect your boiler from sludge.
Learn moreWhat you get when you book us
- Sentinel X100 inhibitor used as standard
- MagnaCleanse and Kamco flushing equipment
- Boiler Plus compliant installs
- Smart thermostat brand-agnostic — Hive, Nest, Tado, Honeywell, Drayton
- Rebalancing included with every flush
Common questions about heating upgrades in Katherines
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.
Will a smart thermostat actually save money?▾
Yes — typically 8–12% off heating bills if you use the scheduling and zone features properly. Hive and Nest both pay back inside two years for most households.
Do I really need a power flush?▾
If radiators have cold patches, your boiler is noisy, or you're fitting a new boiler to an older system, yes. Otherwise a chemical flush and magnetic filter is often enough.
Related services in Katherines
Boiler installs in Katherines
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 repairs in Katherines
No heating or hot water? We respond fast — usually same day — diagnose properly, and give you a fixed price before any work starts.
Boiler servicing in Katherines
Annual servicing keeps your boiler safe, efficient, and your manufacturer warranty valid. Full inspection, combustion analysis, and a written report.
Plumbing in Katherines
Everyday plumbing done properly — taps, toilets, leaks, washing machines, showers, outside taps and isolation valves.
At a glance
- Service
- Heating Repairs & Upgrades
- Coverage
- Harlow (CM17, CM18, CM19, CM20) and surrounding areas
- Response time
- Same-day where possible
- Credentials
- Gas Safe registered, fully insured, 12-month workmanship guarantee
- Pricing
- Fixed written quotes, no surprise extras
Roughly what you'll pay in Katherines
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 |
|---|---|
Single radiator swap supply & fit, like-for-like | from £180 |
Smart thermostat install (Hive/Nest/tado) wired in and configured | from £220 |
Full magnetic filter & power flush extends boiler life, lower bills | from £450 |
TRV upgrade per radiator fitted while system drained | from £45 |
Prices include VAT. Parts quoted separately and shown on your written quote.
Other ways Katherines customers find us for heating upgrades
Same engineer, same fixed pricing — different question, different answer.
Villages near Katherines we also cover
Stop the pressure drop in Katherines
Free written quote, no obligation. Real engineer, fixed price, fast response.