A bad gas valve will not allow any gas to go to the burner or pilot light. See the article on 'Hot Water Heater Gas Valves' for the issues surrounding this device. A clogged or partially clogged vent can cause this problem. See Venting a Gas Water Heater for information on keeping your vent clear.
Definition. A hemoglobin test measures the amount of hemoglobin in your blood. Hemoglobin is a protein in your red blood cells that carries oxygen to your body's organs and tissues and transports carbon dioxide from your organs and tissues back to your lungs. If a hemoglobin test reveals that your hemoglobin level is lower than normal, it means you have a low red blood cell count (anemia). Anemia can have many different causes, including vitamin deficiencies, bleeding and chronic diseases.
HGB test or Hemoglobin test is a test to determine the levels of hemoglobin circulating in the blood.Hemoglobin is contained in the red blood cells and is important in the transport of oxygen from the lungs to the various tissues of the body.It also helps in maintaining the proper structure and shape of red blood cells. If hemoglobin levels are not normal, it may indicate certain illnesses.Usually hemoglobin tests are part of CBC or complete blood count. This is a generic blood test known to many and this involves measurement of certain blood components like, red blood cells, white blood cells, platelets, hematocrit, and hemoglobin.emoglobin tests are done to know if a person has anemia or polycythemia. These conditions involve abnormal measurements of hemoglobin in the blood. When a person has anemia, the function of the red blood cells will be hampered leading to various complications.