Frequently asked questions about Peter
While the tower fan is in use, dust can collect on the device. This can cause a whistling noise. On the back of Peter, there is a grid through which the air is sucked in. Clean this grid with a vacuum cleaner. If the fan is still making a whistling noise, undo the screws and remove the grid. Vacuum the bottom grid as well and wipe it clean with a soft cloth if required. Replace the grid and fasten the screws. Your Peter should now produce the normal level of noise when he is switched on again.