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.
Labtestsonline.org explains that the purpose of an Hgb blood test is to determine the amount of hemoglobin that exists in your blood as well as, how well it is supplying your blood cells with oxygen.In patients with bleeding problems such as, heavy menstrual flows, an Hgb test can determine levels of anemia.abtestsonline.org explains that the purpose of an Hgb blood test is to determine the amount of hemoglobin that exists in your blood as well as, how well it is supplying your blood cells with oxygen.