To give your radiators the best chance of heating up properly after summer, the key is to be active in turning on your central heating for a few minutes every few days, even in warm conditions. This will ensure the hydraulic components of your radiators and alternate heating devices are getting a workout, so to speak.
In addition to this, you should service your boiler annually, with summertime the ideal opportunity to do so, and frequently add inhibitor to your designer radiators to save off the threat of rust or sludge building up.
For a deeper insight, explore our blog, Why are my radiators not heating up after summer?