Should You Turn Off Your Boiler in Summer?

As the weather warms up in London, many homeowners wonder whether it’s best to switch off the boiler during summer. After all, with no need for heating, leaving it on might seem wasteful — but is turning it off completely the right move?

• Lower Energy Bills: If your boiler is only used for heating and not hot water, turning it off can reduce your energy usage.
• Environmental Benefits: Using less gas helps lower your carbon footprint.
• Reduced Wear: Giving the boiler a break could prolong its lifespan — fewer moving parts in use means less wear and tear.

• Combi Boilers: If your combi boiler supplies hot water too, you’ll likely need to keep it running.
• System Health: Some systems benefit from occasional circulation to prevent parts seizing up. Turning the boiler off for months could lead to issues come autumn.
• Frozen Components: Even in summer, sudden temperature drops can happen. Turning your boiler off completely (including frost protection) could cause risk to external pipework.

If you're not using your heating, it's perfectly fine to turn the heating function off via the thermostat or boiler control. However, unless you're going away for an extended period, it's usually best to leave your boiler on standby — especially if it supplies hot water.

Still unsure? Video call one of our engineers for a free, no-obligation opinion. We’re here to help.

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