A closed shut-off valve – if the valve is closed or partially closed and the unit is on, then the water won’t be able to make its way further through the system.A malfunctioning gas burner assembly – in such a case, you might have to replace the component.The water heater is placed too close to other objects – it is recommended to have 24 inches of clearance in front of the unit and at least 2 inches at the back and sides.A limitation in gas supply – if the gas is struggling to get through the line (the line is bent, damaged, or poorly fitted), then it might start making a humming sound.Here are the main causes of a humming sound in a gas water heater: Read: Is Furnace And Water Heater The Same? Why Is There Gas Water Heater Humming Noise?
There is also a gas supply pipe, a gas valve, and a pilot light or an electronic ignition system that lights the burner.įinally, you have hot water running through the pipes.Īll these elements and processes do produce sounds, but the chances are high that you won’t be paying any attention to those. To find out more about the ‘normal’ sounds, you should have an understanding of how the system works.įirst of all, there is a cold-water supply pipe that provides the unit with fresh water. Once you get used to the sound of normal operation, it would be easier for you to identify the noises that you should be worried about. You’ll hear all sorts of noises while a gas water heater is operating, but these sounds shouldn’t be too loud.
Are Gas Water Heaters Supposed to Make Noise? Your gas water heater might start humming in case the gas is struggling to get through the line, the gas burner assembly is malfunctioning, the shut-off valve is closed, the unit is placed too close to other objects, or there is a loose component in the water heater. But that’s not necessarily a bad thing as once you get used to the ‘normal’ sounds, it would become much easier for you to notice the strange noises indicating that something is wrong.
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