Summer Maintenance Tips for Your Radiators & Heating

As the weather continues to warm up and our thoughts turn away from heating our homes and towards trying to keep cool, now is the perfect time to check that your home’s heating is in good working order.

Performing basic maintenance now ensures your heating system is efficient, safe, and ready when the temperatures drop. Here are seven essential tips to keep your radiators in top shape during the warmer months:

Switch On Your Heating at Least Once a Month

During summer, it’s easy to forget your central heating system exists—but leaving it idle for months can cause valves to seize or components to stick. To prevent this, turn your heating on for 10–15 minutes at least once a month. This simple habit keeps water circulating, ensuring valves and pumps remain in good working order. It also gives you a chance to spot any minor issues before they escalate into expensive repairs when colder weather returns. A quick test run now can save you from a cold surprise in winter.

Give Your Radiators a Clean

Radiators often gather dust and debris over time, especially when they’re not in use. Summer is the perfect time to give them a thorough clean. Dust buildup can reduce heating efficiency by acting as insulation, stopping warm air from circulating freely. Use a vacuum with a brush attachment and a radiator cleaning brush to reach between the fins. Cleaning your radiators not only improves their performance but also helps maintain air quality by reducing allergens that circulate when the heating is turned back on.

Open Up Your TRVs to the Max

Thermostatic Radiator Valves (TRVs) can become stuck in the closed position if left unused during the warm months. To prevent this, adjust and open them fully during summer. This helps avoid internal pin mechanisms from seizing - a common issue that can leave you without heat in a specific room w hen you need it most. Fully opening TRVs keeps the valves flexible and operational, ensuring they’re responsive when colder temperatures return. It’s a quick and simple task that helps prolong the lifespan of your radiator controls.

Inspect for Leaks & Corrosion

Summer provides a stress-free opportunity to inspect your heating system for any signs of leaks or corrosion. With the heating off, you can easily check pipe joints, radiator valves, and the base of the radiators for rust spots or damp patches. Corrosion often appears as discolouration or bubbling paint, while leaks may cause puddles or unusual dampness. Spotting and addressing these issues early prevents structural damage and avoids larger repair bills down the line. If anything looks suspicious, call a heating professional before winter arrives.

Bleed your Radiators

Air trapped in radiators can stop them from heating evenly, leaving cold spots and reducing efficiency. Even if your radiators worked fine last winter, it’s smart to bleed them during the summer. You’ll ensure they’re ready for full performance when the temperature drops. Use a radiator key to slowly release trapped air until water flows steadily. This restores the proper water-to-air balance and improves heat output. It’s a quick task that pays off with better warmth and lower energy bills in colder months.

Schedule a Boiler Service and Safety Check

Summer is the ideal time to book your annual boiler service. Heating engineers are typically less busy, meaning quicker appointments and potentially lower rates. A qualified technician will inspect and clean key components, test for carbon monoxide leaks, and ensure the system runs safely and efficiently. Regular servicing extends the life of your boiler, reduces the risk of breakdowns, and keeps your warranty valid. Don’t wait until it’s cold and crowded—get peace of mind by taking care of it during the off-season.

Replace Your Radiators

If your radiators are outdated, rusty, or underperforming, summer is the best time to replace them. With no urgent heating demand, you have the flexibility to plan upgrades without disruption. Modern radiators are more efficient and can be sized appropriately for each room’s needs, helping you cut energy costs. You can also take the opportunity to switch to styles that better suit your décor or opt for smart radiators with programmable features. Upgrading now ensures your home will be cosy and cost-effective by winter.

Why?

Performing radiator maintenance in summer is all about staying ahead. When heating systems are idle, they’re prone to issues like seized valves, hidden leaks, or internal air buildup. These problems often go unnoticed until it's too late, leaving you cold and stressed in the middle of winter. Tackling maintenance while your heating system is off gives you the time and space to spot issues early, make informed upgrades, and avoid peak-season repair delays. Think of it as an investment in comfort, efficiency, and peace of mind.