Of course there is no convenient time for a boiler repair, but you could avoid costly repairs by having your boiler serviced regularly.
The ideal time to have your boiler serviced is in the spring/summer period when you should no longer require the heating on. As we are a heating company based in the UK where the weather is, to put it mildly, changeable, please don't hold us to that.
Servicing your boiler allows early identification of leaks and potential faults. Not only can regular, professional maintenance of your boiler save you money, it can also reduce the risk of danger and the potential problems associated with carbon monoxide.