How often should a central heating system be serviced?

We recommend having your boiler and heating system serviced every 12 months. Annual servicing keeps the system running efficiently, extends its lifespan, and is often a condition of the boiler manufacturer's warranty. It also means any developing problems are caught early, before they become expensive repairs.

Why are some of my radiators cold at the top but warm at the bottom?

This is usually caused by trapped air in the radiator, which can be resolved by bleeding it. If bleeding doesn't help, or if the radiator is cold all over, there may be a sludge build-up in the system or a faulty thermostatic radiator valve. Our engineers can diagnose and fix the issue quickly.

What is a power flush and do I need one?

A power flush is a deep-clean of your central heating system that removes sludge, rust and debris from the pipework and radiators. Signs that you may need one include cold spots on radiators, noisy pipework, a boiler that cuts out frequently, or discoloured water when you bleed a radiator. It significantly improves system efficiency and is often recommended before a new boiler is installed.

Can you add a radiator to an existing central heating system?

Yes. We can add new radiators to an existing system, replace old ones, or reposition them as part of a home renovation. We'll check that your boiler has sufficient output capacity before any additions are made and advise on the best approach for your home.

My heating is on but the house isn't getting warm — what could it be?

There are several possible causes: a boiler working below its rated output, significant sludge build-up in the system, poorly balanced radiators, or inadequate insulation. Our engineer will carry out a systematic check of your boiler, controls, and radiators to find the cause and recommend the most effective fix.

Central Heating in Greenwich

Central heating installation, repairs and power flushing in Greenwich to keep your home warm, efficient and reliable.

5.0 · 73 verified reviews

Clear & Upfront Pricing
24/7 Callouts, 365 Days A Year
Trusted Local Business
Gas Safe Registered Installers
£5,000,000 Public Liability Insurance

0203 886 2602

Greenwich Plumbers engineer working on central heating in Greenwich

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Central Heating Services in Greenwich

A well-maintained central heating system keeps your home warm, comfortable and economical to run. Greenwich Plumbers install, repair and maintain central heating systems across Greenwich and the surrounding SE10, SE3, SE7, SE8, SE13, SE18, SE9 and SE12 areas. From adding a single radiator to designing and fitting a complete new system, our Gas Safe registered engineers do the job properly.

If your radiators are cold at the bottom, slow to warm up or noisy, your system may need balancing, bleeding or a power flush to clear sludge and improve circulation. We diagnose heating problems accurately and recommend the most effective fix, whether that's a repair, a new pump or thermostat, or an upgrade to smart heating controls that give you better comfort and lower bills.

We service and upgrade central heating right across Greenwich, flushing sludge and treating the system so it runs quietly and efficiently in older and newer homes alike.

As Worcester Bosch and Vaillant accredited installers, we work with quality components and take pride in tidy, reliable workmanship. Everything is tested and balanced before we leave, so your whole home heats evenly. For heating that has failed completely, we're available 24/7.

Call 0203 886 2602

Greenwich Plumbers engineer fitting a thermostatic radiator valve during central heating work in Greenwich

Our Central Heating Process

Assess your system
We review your boiler, radiators, pipework and controls to understand how your heating is performing.
Plan the work
Whether it’s a repair, upgrade or full system, we explain what’s needed and provide a clear quote.
Install or repair
Our Gas Safe engineers carry out the work to a high standard, from new radiators to full system installs.
Balance & test
We balance the system, check every radiator heats evenly and confirm the controls work as they should.

Common central heating problems we sort in Greenwich

If you need a plumber in Greenwich for central heating faults, we handle the everyday issues that crop up in local homes, from Victorian terraces in SE10 to riverside flats and older houses near the park. Our Greenwich plumbers diagnose the cause properly, then put the system right without fuss.

Cold Radiators

Cold radiators or cold spots often point to trapped air, sludge build-up, stuck valves, or poor circulation from the pump or balance settings. We check the full system, bleed and balance radiators where needed, and advise if a deeper clean or repair is the better fix.

Power Flushing

If the heating is slow to warm up, noisy, or leaving some rooms cooler, sludge and rust may be restricting flow through the pipes and radiators. We carry out power flushing to clear the system, improve circulation, and help protect the boiler and radiator valves from further wear.

Radiator Replacement

A leaking, corroded, or badly undersized radiator can hold the whole heating system back, especially in larger rooms or draughty period properties. We remove the old unit, fit the correct replacement, and make sure the pipework and valves are matched to the system properly.

Smart Thermostats

Smart thermostats and controls can help you heat the house more evenly and avoid wasting energy, but only if they are set up and wired correctly. We install and configure controls, test the connection to the boiler, and show you how to use the settings in daily life.

Noisy Pipes

Banging, ticking, or whistling pipes usually means expansion, loose clips, air in the system, or water pressure problems. We trace the source carefully, secure any movement, and adjust the heating controls or pipework so the system runs more quietly and safely.

TRV Problems

Thermostatic radiator valves can stick, seize up, or stop reacting properly, which leaves some rooms too hot and others too cold. We test each TRV, free off or replace faulty valves, and set the heating so each room gets the right level of control.

Expert Advice

“Banging pipes and cold-at-the-bottom radiators are usually an easy fix. A proper flush gets Greenwich heating running quietly and efficiently again.”

JohnCentral Heating & Plumbing17 years’ experience

Frequently Asked Questions

: We recommend having your boiler and heating system serviced every 12 months. Annual servicing keeps the system running efficiently, extends its lifespan, and is often a condition of the boiler manufacturer's warranty. It also means any developing problems are caught early, before they become expensive repairs.
: This is usually caused by trapped air in the radiator, which can be resolved by bleeding it. If bleeding doesn't help, or if the radiator is cold all over, there may be a sludge build-up in the system or a faulty thermostatic radiator valve. Our engineers can diagnose and fix the issue quickly.
: A power flush is a deep-clean of your central heating system that removes sludge, rust and debris from the pipework and radiators. Signs that you may need one include cold spots on radiators, noisy pipework, a boiler that cuts out frequently, or discoloured water when you bleed a radiator. It significantly improves system efficiency and is often recommended before a new boiler is installed.
: Yes. We can add new radiators to an existing system, replace old ones, or reposition them as part of a home renovation. We'll check that your boiler has sufficient output capacity before any additions are made and advise on the best approach for your home.
: There are several possible causes: a boiler working below its rated output, significant sludge build-up in the system, poorly balanced radiators, or inadequate insulation. Our engineer will carry out a systematic check of your boiler, controls, and radiators to find the cause and recommend the most effective fix.