Bleeding radiators before switching your heating on for the first time in the autumn is an easy way to save money, experts have said. One of the most important jobs is bleeding radiators for excess trapped air, which can prevent them from heating up properly. Doing this at least once a year, ideally before the heating is switched on, can keep them heating efficiently and save on energy bills. To help, Sam Williams, DIY expert at SGS Engineering , explains the steps to go through and all the tools you’ll need. How to bleed your radiatorsStep 1: Gather up the tools you’ll needThe first step is to source all of the tools that you’ll need to complete the job.