Here are some key points about neuropathy. More detail and supporting information is in the main article. 1  Neuropathy is a common condition. 2  Neuropathy is a complication of a number of different medical conditions. 3  Three types of nerve can be involved; autonomic nerves, motor nerves and sensory nerves. 4  Sometimes single nerves, or nerve sets are affected.
If you never remove the scale from a water heater tank the clanking or cracking noise heard at the water heater during operation may eventually cease when the scale solidifies, no longer trapping hot water and interfering with its movement upwards in the water tank.
When Popping Noises Get Serious. Most of the time, the water heater only pops or makes a percolating sound similar to that of an old coffee pot. However, if the sounds are more like that of a pot on the boil, a serious problem might exist. One safety feature of hot water heaters is a pressure relief valve that allows steam to bleed from the tank.