Seasonal Heating Checklist: Preparing Your Radiators for Winter

As we battle to keep cool in the hot summer months, naturally, the thought of home heating is the last thing on our minds. However, now is the perfect time to check that your home’s heating is in good working order, so you're not caught short when the temperature drops.
 
Carrying out a handful of basic maintenance tasks sooner rather than later ensures your heating system is efficient, safe, and ready for when the temperatures eventually plummet. Below are seven essential tips to keep your radiators in top shape during the warmer months:

Turn Your Heating on Once a Month (At Least)

In the warmer months, it’s easy to overlook your central heating system, but letting it sit unused for long stretches can cause valves to seize or parts to stick. To avoid this, switch your heating on for about 10–15 minutes once a month. This keeps water moving through the system, helping valves and pumps stay in good condition. It also allows you to catch small problems early, before they turn into costly repairs when the temperature drops. A short run now could save you from an unwelcome chill come winter.

Clean Your Radiators

Over time, radiators tend to accumulate dust, dirt, and other debris, particularly when they haven’t been used for a while. Summer provides an ideal opportunity to give them a deep clean. A thick layer of dust can hinder heating efficiency by acting like insulation, preventing warm air from flowing freely throughout the room. To clean effectively, use a vacuum with a brush attachment, along with a radiator cleaning brush, to reach the narrow spaces between the fins and/or tubes. Keeping your radiators clean not only boosts their performance but also promotes healthier indoor air by reducing the allergens that are released once the heating is switched back on.

Open TRVs to Their Maximum

Thermostatic Radiator Valves (TRVs) may seize in the closed position if they remain unused for long periods, particularly over the warmer months. To avoid this, it’s a good idea to turn them to their maximum open setting during summer. Doing so prevents the internal pin mechanism from sticking - a frequent problem that can result in a cold, unheated room just when you need warmth the most. Keeping TRVs fully open during the off-season ensures the valves stay free-moving and responsive, ready for use when temperatures drop again. It’s a quick, low-effort step that can extend the life and reliability of your radiator controls.

Check for Leaks and Corrosion

The summer months offer an ideal, low-pressure time to give your heating system a thorough once-over for any signs of wear, leaks, or corrosion. When the system is switched off, it’s easier to safely inspect key areas such as pipe joints, radiator valves, and the lower sections of radiators for rust marks, damp patches, or water staining. Corrosion can present itself as flaking or bubbling paint, or as areas of noticeable discolouration, while leaks may be indicated by small puddles, persistent dampness, or an unusual musty smell. Detecting and resolving these problems early can help protect your home from structural damage and save you from costly repair work later. If you notice anything out of the ordinary, arrange for a qualified heating engineer to take a look well before the colder months set in.

Bleed Your Radiators

Air trapped in radiators can stop them from heating evenly, leaving cold patches and wasting energy. Even if your radiators worked flawlessly last winter, bleeding them during the summer is a smart move - it ensures they’ll deliver full warmth when temperatures drop. This restores the proper water-to-air balance, boosting heat output and system efficiency. Taking just a few minutes now can save you frustration, keep your home cosy, and even lower your heating bills when winter arrives. Check out our quick Radiator Bleeding Guide here.

Boiler Service & Safety Check

Summer offers the perfect opportunity to arrange your yearly boiler service. During the warmer months, heating engineers often have lighter schedules, which can mean faster appointment times and even the possibility of reduced costs. An experienced, certified technician will thoroughly inspect and clean essential components, check for any signs of carbon monoxide leakage, and confirm that your system is operating both safely and efficiently. Routine maintenance not only prolongs your boiler’s lifespan but also lowers the likelihood of unexpected faults and helps maintain your manufacturer’s warranty. Avoid the winter rush and potential delays, and enjoy peace of mind by getting it done while demand is low.

Time for New Radiators?

If your radiators are old, showing signs of rust, or simply not heating as well as they should, summer is the ideal season to replace them. Without the pressure of immediate heating needs, you can schedule upgrades at your own pace and avoid disruption to daily life. Newer radiator models are designed for improved efficiency and can be matched precisely to each room’s size and heating requirements, reducing wasted energy and lowering bills. This is also a great chance to choose designs that complement your interior style or invest in smart radiators with programmable settings for greater control. Acting now means your home will be warm, efficient, and ready for the cold months ahead. You can view our full range of Radiators here.

Why?

Carrying out radiator maintenance during the summer is all about staying one step ahead. When your heating system sits unused for months, small problems can quietly develop - from stiff or stuck valves to slow leaks or pockets of trapped air. Left unchecked, these hidden issues often reveal themselves at the worst possible moment, leaving you chilly and scrambling for repairs in the depths of winter. By taking care of maintenance while the system is switched off, you have the breathing room to spot potential faults early, replace worn parts, and even make efficiency-boosting upgrades without the pressure of peak repair season. It’s a proactive approach that safeguards warmth, saves money, and keeps your home running smoothly when you need it most.