03/07/2025

Should I turn my oil heating system off in the summer months?

As the warmer months roll in and radiators stay cold, many homeowners with oil heating systems start asking the same question: “Should I switch it off altogether until autumn?”

It’s a good question, and the answer depends on a few things, like the type of system you have, your hot water needs, and how well you want your tank and boiler to hold up long-term. At Oil Tank Change, we’ve worked with oil heating systems of all shapes and sizes, so we’ve put together this guide to help you make the best choice for your home.

Have any questions about your oil tank? Contact a member of our team for help.

Do you still need hot water?

Even in summer, most households still need hot water for washing up, showers, and general day-to-day life. If your oil heating system also heats your hot water, as many do, turning it off completely might leave you without enough.

Check if your oil boiler provides hot water or if you have an immersion heater as a backup. If you do have a secondary option, you might choose to rely on that through summer and give your oil system a rest. If not, you’ll likely need to keep the boiler running, even if just occasionally.

What happens if you leave it off for too long?

Switching your oil heating off entirely for several months can lead to a few small, but avoidable issues.

When a boiler sits unused, internal parts can seize up. Valves and pumps benefit from regular movement, and prolonged inactivity can actually reduce the lifespan of your system. Similarly, fuel lines can dry out or develop blockages, especially if there’s any water or sludge in your tank.

Running your boiler every now and then, even just for 15 minutes every few weeks, can keep things moving and healthy. It’s a small step that can save you a call-out when autumn arrives.

Looking for a specific service? At Oil Tank Change, we offer relocations, replacements, and emergency call-out services. Call a member of our team today on 01638 781710.

Is it more efficient to leave it on?

This depends on your setup. If you’re only using your boiler to heat hot water in the summer, you may not be using that much oil, especially if your home is well-insulated or you have a modern, efficient system.

Turning the whole system off might save a little oil, but if it leads to a breakdown or blocked line, the repair could cost more than the savings. It’s about balance: running your system occasionally can actually be more cost-effective in the long run.

Summer is a great time for servicing your oil tank

If your heating is off or being used less, summer is the ideal time to book a service. You’ll beat the autumn rush, and any issues (like sludge build-up or corrosion) can be spotted before they turn into a bigger problem.

We often help homeowners during this quiet season, checking tanks for wear and tear, inspecting pipework, and making sure everything’s running smoothly before the colder months return. As a family-run team, we know how important it is to keep things stress-free, and summer check-ups are a great way to do just that.

What about your oil tank in summer?

While you’re thinking about your heating system, it’s a good idea to keep an eye on your oil tank too. Hot weather can cause the tank to expand and contract, and UV rays can wear down older plastic models over time. Checking for any signs of cracking, bulging, or faded colouring is a smart move.

If your tank is looking a bit worse for wear or hasn’t been inspected in a while, summer is the perfect time to get it looked at while you’re not relying on it so heavily.

So, should you switch your oil heating system off in the summer?

It’s usually best to keep your oil heating system running at a low level or turn it on occasionally during the summer. This keeps everything in good working order, ensures you’ve got hot water, and helps you avoid any nasty surprises come autumn.

If you’re not sure how your system is set up or what’s best for your home, we’re always happy to help. At Oil Tank Change, we’ve been helping families keep their heating systems safe and efficient for years, and we’re just a phone call away if you need a bit of friendly advice. Call us today on 01638 781710 to book a check-up or ask about your oil tank.