However they do go bad and testing water heater thermostats is still required. Your water heater usually has two elements and two thermostats. The upper thermostat has two functions. First it allows the upper element to heat the water in the top of the tank. When this water is hot enough it shuts the upper element off.Then it allows power to go to the lower element.owever they do go bad and testing water heater thermostats is still required. Your water heater usually has two elements and two thermostats. The upper thermostat has two functions. First it allows the upper element to heat the water in the top of the tank. When this water is hot enough it shuts the upper element off.
Rio de Janeiro is the 2 nd largest city in Brazil and is a very common place for tourists to visit. But despite of all these things, it is considered as one of most dangerous cities in the world in 2015.Drug trafficking and violent crimes are at peak in this city. There have been a lot of assassination attempts between various gangs which has taken control of the entire city.ut, there are few cities in the world that you should avoid to visit at any cost in 2015. In this article, we are going to list the top 10 most dangerous cities 2015.
1 Popocatepetl -- Popocatepetl is an active volcano in the Trans-Mexican Volcanic Belt. Located near Mexico City, this volcano is considered by many to be the most dangerous in the world since a large eruption could potentially kill millions of people.