Fiesta Ka and Puma heater valve

Hi Youtubers, this is just a quick video advisory detailing common reasons why Fiesta, Puma and Ka heaters can fail. Normally this failure means you don't get any heat or the heater is jammed on full. 9 times out of 10 it's due to a faulty heater valve which is basically a motor controlled tap which controls the flow of hot water from the engine to the matrix (works like your home domestic radiator)