Preparing for Autumn: Boiler Maintenance Checklist

After a summer of little to no use, your boiler may need some attention to get it working at its best again. That’s where autumn boiler servicing comes in. 

Working your way through a thorough boiler maintenance checklist can help to ensure your heating system is safe, efficient, and ready to handle the colder months ahead. By identifying and rectifying key maintenance tasks now, you’ll reduce the risk of breakdowns, improve energy efficiency, and help keep your home warm and comfortable when the weather takes a turn for the worse.

We’ve put together a detailed boiler maintenance checklist to help you prepare,  covering everything from bleeding your radiators to checking boiler pressure and scheduling a professional service. 

Whether you’re a first-time homeowner or someone who likes to stay ahead of potential problems, our guide will help you prepare your heating for winter with confidence.

1. Turn your boiler on early

Turning your boiler on for short periods earlier in the year - even if you don’t need full heating yet - can help you to identify any issues before the temperatures really drop. You don’t want to wait for the first cold snap to hit, only to discover that your boiler isn’t working as it should be. 

Running your system for short periods gives you time to spot any unusual noises, faults, or warning lights, and means you can arrange repairs in advance, rather than facing delays during peak winter demand, or potentially being without heating when a chill hits. This simple step also helps keep internal components moving and prevents parts like the pump from seizing up during long periods of inactivity.

2. Check the boiler pressure

Make sure that your boiler pressure is within the manufacturer’s recommended range - typically between 1 and 1.5 bar when the system is cold. Low pressure can reduce the efficiency of your heating and may prevent your boiler from working altogether. In contrast, high pressure can put unnecessary strain on the system and potentially cause leaks. 

You can check the pressure using the gauge on the front of your boiler. If the pressure drops frequently or rises too high, it could indicate a fault that needs professional attention.

3. Bleed the radiators

If your radiators feel cold at the top but warm at the bottom, it’s likely that trapped air is preventing hot water from circulating properly through the system. Not only does this reduce the heat output, but it also forces your boiler to work harder, resulting in increased energy consumption and the system experiencing more wear than is necessary. 

Bleeding your radiators releases any trapped air, meaning that heat distributes evenly. All you need is a radiator key and a cloth; simply turn the valve until you hear a hissing sound, and close it once water starts to escape. Find out more about how to bleed a radiator on our blog.

4. Book a professional boiler service

Booking an annual boiler service with a Gas Safe registered engineer is one of the most important steps you can take when it comes to ensuring the long-term health of your heating system. A professional service helps identify and fix potential issues, reducing the risk of unexpected breakdowns when you need your boiler most. 

It also ensures your system is running safely, efficiently, and in line with manufacturer recommendations, which can help to extend the life of your boiler, and even reduce your energy bills.

Regular servicing may also be a requirement to keep your boiler or heating system’s warranties valid, too. For peace of mind all year round, explore Swale Heating’s service plans for flexible and affordable cover options tailored to your needs.

5. Test the thermostat and heating controls

If you’ve been turning your boiler on early, and your heating isn’t coming on when expected or the temperature feels off, your controls may need recalibrating or replacing. It’s good practice to check that your thermostat, timer, and any heating controls are functioning correctly before the colder weather sets in.

Faulty timers or thermostats can lead to energy waste and inconsistent temperatures throughout your home. You may also want to take this opportunity to consider upgrading to a smart thermostat, which allows for more precise control over your heating schedule, even when you're away. 

6. Inspect for leaks or corrosion

As part of your checklist, you should take a close look around your boiler (including nearby pipework and the surrounding area) for any signs of trouble. This could include:

• Visible leaks
• Rust
• Damp patches
• Or unusual marks on the walls or flooring near the boiler. 

Even small drips or dried water stains can indicate a slow leak or potential internal corrosion, which, if not treated, could worsen over time. Corroded components can compromise the efficiency of your boiler and even lead to breakdowns or safety issues, so it’s best to call in a professional to assess the situation before it becomes a more serious (and costly) problem.

7. Clear the area around your boiler

It’s easy for clutter to accumulate around your boiler if it’s housed in a cupboard or utility room. Whether it’s boxes, laundry, cleaning supplies, or other household items, this clutter can obstruct essential ventilation, making your boiler less efficient, or even pose a safety risk.

Restricted access to the boiler can also make it more difficult for engineers to carry out routine servicing or emergency repairs. Take time to clear a safe space around the unit, ensuring it’s well-ventilated, accessible, and compliant with manufacturer recommendations and safety standards. This is particularly important to do in the run-up to any annual boiler servicing appointments you may have coming up. 

Prioritise boiler care with Swale Heating 

Whether it’s checking your radiators, bleeding your system, or booking an annual boiler service, maintaining your heating system before autumn fully sets in is key to a worry-free winter. 

If you're unsure where to begin or need professional support after finding something concerning during your checks, our expert team at Swale Heating is here to help. 

From comprehensive central heating system services to flexible gas boiler cover and service plans, we offer everything you need to stay one step ahead - no matter the season. 

Get ahead of your autumn boiler servicing today by getting in touch with one of our knowledgeable team.