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Yes, you have to shut off the gas going to the water heater. There should be an inline shutoff around it. Otherwise your going to be leaking a lot of gas which is very dangerous.
When you ignites, I assume you mean it fires. If so you have a dirty or defective flame sensor. Usually they can be cleaned with steel wool or a piece of fine sand paper, do not rub aggresively!
As the term implies, it is supposed to varify that the gas has indeed ignited and sends a signal to the gas valve to remain open. If the sensor has a built up film from dirt or moisture it does not properly sense the flame and shuts the gas valve off to prevent a build up of gas in the burner box.
You are sure it is LEAKING pater at all those 4 locations-- correct? None of the water is from condensation, right?
If you have had pressure water leaks for many years-- then likely a lot of damage has been done to the insulation-- and the sheet metal outer liner? Does the sheet metal 'skin' (outside jacket get real warm?-- if so, you are loosing a lot of energy -- Probably time to invest in a new, better insulated, and more efficient combustion burner- and this time, Make sure there are NO LEAKS, when the installation is done! Mack B
when to local dist. got owners manuel which after installing 4 of these uints the person impersonating a plumber took with him. easy to understand tbl shooting. resolved tbl. thanks
Ok the way this system works is from a pressure and flow switch. The pressure switch picks up the slight drop in pressure when the hot side water is turned on then turns on the burner. The flow switch measures the amount of water flowing and adjusts the size of the burner to the amount of water flow. So a couple different things might be happening. The flow switch might be sticking causing the water heater to throttle down the burner but not off when the water flow is off. Or the gas control valve might be by-passing gas when off causing the burner to stay on even when the demand is off. Run the hot water on high demand then turn the water off. If the burner is still on try banging on the water heater with your hand and see if the burner shuts off completely. If it does the gas control valve might be by-passing. You would also need to check and see if the pressure/flow switch is giving any voltage signal changes when the water flow is off. These tankless water heaters are more comlplicated to work on than a standard water heater and you may need a professional's help...good luck
Is hot water present when opening the drain valve. Use a bucket to catch the water. Adjust thermostat from high to kow then prefered detting. Make sure hot water out line does not have a closed valve. If gas, ck pilot. If electric, elements may be damage if heater was powered up before or while initial filling.
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