Things to consider:
Whether your turn your boiler off in the summer or not depends entirely on what you normally use your boiler for throughout the colder months. It may be a good way to save on your bills, but is it worth it practically?
According to this article from boilerguide, there are a few things to consider:
– If your shower is electric, you won’t need your boiler for hot water.
– Your appliances and white goods e.g dishwasher and washing machine need to be cold fill.
This means that they generate their own hot water.
– Make sure you get your boiler serviced regularly, especially if you plan to turn it off.
The full article can be found on boilerguide.co.uk.