★★★★★
"Amazing, efficient and honest. Did a great job on our central heating and we could not recommend him more highly. Always the first person we call now."
Central Heating Installation & Repair in Manchester & Greater Manchester
Full central heating installations, power flushing, upgrades and repairs across Greater Manchester. Gas Safe registered. Fixed prices.
🛡 Gas Safe Reg: 559988 · 18+ Years Experience · Same-Week Available · Fully Insured & Guaranteed
What Does Central Heating Involve?
Central heating services from Kamdem HomeTech cover the complete spectrum of domestic central heating work — from brand-new system installations in older properties that currently have no central heating, through to power flushing, system upgrades, and targeted repairs on existing systems that are underperforming.
New central heating installation involves fitting a new boiler, installing radiators throughout the property, running new pipework, fitting thermostatic radiator valves (TRVs) and a programmable room thermostat, connecting the system to the mains water supply, and commissioning and pressure-testing the completed installation to Gas Safe and Building Regulations standards. We advise on the correct boiler type and size for the property before any installation begins. See our boiler installation page for boiler-specific details.
Existing system services we carry out across Greater Manchester include:
- Power flushing — the forced circulation of cleaning chemicals through the entire central heating system to remove black iron oxide sludge (magnetite), limescale, and corrosion products. Power flushing restores efficiency, eliminates cold spots in radiators, and protects the boiler's heat exchanger. Essential for any system that has not been flushed in 5+ years, and always recommended when a new boiler is fitted (why we include a system flush with every new boiler installation)
- System balancing — adjusting the flow rate to each radiator to ensure heat is distributed evenly throughout the property, eliminating rooms that are consistently too hot or too cold
- Zone valve replacement — including 2-port and 3-port mid-position valves that control which zone of the system (heating, hot water, or both) receives flow
- Expansion vessel replacement — a failed expansion vessel causes rapid and repeated pressure loss and is a common fault on systems over 8 years old
- Circulation pump replacement — pumps wear over time; a failing pump causes poor heat distribution, noise, or complete system shutdown
- System controls upgrades — replacing older programmer/thermostat combinations with modern smart controls (Nest, Hive, Tado) to reduce energy consumption and improve comfort
- Full system repair — diagnosis and rectification of any central heating fault not covered above
If your radiators have cold spots at the bottom, your heating system takes a long time to warm up, your boiler is making a kettling noise, or your energy bills have risen without an obvious explanation, these are all warning signs of sludge accumulation requiring a power flush. Individual radiator faults are covered in detail on our radiator repair page.
What Happens When You Delay?
Sludge accumulation in a central heating system is progressive and invisible until it causes problems. Over 3–5 years without proper maintenance, black magnetite sludge circulates through the system, settling in radiators (causing cold spots at the bottom), coating the pump impeller (reducing flow and accelerating pump wear), and — most expensively — coating the heat exchanger in the boiler, reducing thermal efficiency and eventually causing the heat exchanger to fail.
A power flush carried out at the right time — before the heat exchanger is damaged — costs £350–£600 and restores the system. A heat exchanger replacement on a mid-range boiler costs £600–£1,200, and on older boilers, often makes replacement the more economical option. A system that has never been flushed and develops a seized pump or failed heat exchanger simultaneously can trigger a complete system replacement costing £3,000–£6,000 or more.
If your system is showing warning signs — cold radiator bottoms, slow warm-up, boiler kettling — act now. The window between "power flush needed" and "heat exchanger failed" is shorter than most homeowners assume.
Our Process — Simple, Transparent, Reliable
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Free Diagnosis & Quote
Clear fixed-price quote with no obligation.
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Engineer Dispatched Fast
Qualified Gas Safe engineer — usually within the hour.
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Expert Work Carried Out
Clean, methodical workmanship by certified engineers.
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Job Done & Guaranteed
We clean up and guarantee every job we complete.
Why This Matters For You
Protects the Boiler
Circulating sludge is the primary cause of premature heat exchanger failure. Power flushing and a properly maintained system are the most cost-effective way to maximise your boiler's operational life.
Reduces Energy Bills
A clean, balanced, well-maintained central heating system operates at peak efficiency. Removing sludge and balancing radiators can reduce gas consumption measurably — translating to lower monthly bills.
Even Heat Across Every Room
System balancing ensures every radiator in the property reaches the correct temperature — eliminating the common problem of some rooms being too hot while others remain cold.
Gas Safe Certified
All central heating work carried out by Kamdem HomeTech is performed by Gas Safe registered engineers (Reg: 559988) and meets all current Gas Safe and Building Regulations requirements.
All System Types Covered
Open-vented systems, sealed pressurised systems, S-plan and Y-plan configurations, underfloor heating integration — we work on all domestic central heating system types across Greater Manchester.
Fixed Price — Agreed Before We Start
We quote all central heating work in writing before starting. You know exactly what you're paying — no scope creep, no post-job extras.
Frequently Asked Questions
How do I know if my central heating system needs a power flush?
The most common signs are: cold spots at the bottom of radiators (sludge settled in the radiator base); some radiators are completely cold while others heat normally; the heating system takes longer than it used to reach temperature; the boiler is making a kettling or rumbling noise; and your energy bills have increased without a change in usage. If your system has never been flushed and is more than 5–6 years old, a power flush is likely overdue.
How long does a power flush take?
A typical residential power flush takes 6–8 hours for a property with 8–12 radiators. Larger properties with more radiators may require a full day. We carry out power flushes using professional power flushing equipment with magnetic filtration.
Do I need a power flush when I get a new boiler?
In most cases, yes — and most boiler manufacturers and approved installers (including Kamdem HomeTech) recommend it. Installing a new boiler on a sludge-contaminated system can void the warranty and significantly shorten the new boiler's heat exchanger life. We include system flushing as standard in all our new boiler installation quotes.
My radiators have cold spots at the top — is that the same as sludge at the bottom?
No. Cold spots at the top of a radiator indicate trapped air, which is resolved by bleeding the radiator. Cold spots at the bottom indicate sludge (magnetite) settlement, which requires a power flush. Both issues affect heating efficiency and should be addressed.
Can you install a brand-new central heating system in a property with no existing heating?
Yes. We carry out complete new central heating installations — including boiler, all pipework, radiators, TRVs, and controls — in properties converting from storage heaters, direct electric heating, or no central heating at all. Contact us for a full survey and fixed-price quote.
How much does a power flush cost?
Power flush pricing depends on the number of radiators in the property and the condition of the system. Contact us on 07826 088938 for a free assessment and fixed-price quote.
Do you install smart thermostats alongside central heating work?
Yes. We advise on and install Nest, Hive, Tado, and manufacturer-specific smart controls alongside all central heating work — including new installations and boiler replacements.
What guarantee do you provide on central heating installations?
All Kamdem HomeTech installations are covered by our written workmanship guarantee. New boiler installations also carry the relevant manufacturer warranty (up to 10 years on qualifying Worcester Bosch models when installed by our approved engineers).
Ready to Get Started?
Call Kamdem HomeTech or submit the online form. We respond within 2 hours.
⭐ 4.7-Star Rated · Gas Safe · Fully Insured