It may well have been coats and jumpers weather recently, but the summer is generally the best time to test your central heating system and make sure it is in tip-top shape for when you need it. To this end we have a second video from James of James Gas Services for you. Here James shows how to make sure that your radiators heat all the way to the top, thus saving money on your heating bills, keeping you warm and saving you calling out a tradesman into the bargain.