Here’s a list of common noises from hot water heater and their usual causes. One of these things could be wrong.
Popping, Banging, Crackling, Gurgling, Ringing, Rapid Surging Boiling Water, Rumbling
If you hear loud popping, cracking, or clanking noises from your hot water heater while operating it, it’s probably because mineral deposits have accumulated on the bottom of the water heater tank’s interior surface.
If your water heater is an electric unit, mineral deposits can cause a hissing noise when the heating electrodes are operating.
The element in an electric water heater is commonly placed vertical in relation to the tank. Water flowing around the element can cause vibrations in this situation, creating a humming noise. Tighten the element slightly to correct the problem.
Knocking or Hammering
A knocking sound in your walls is related to pipes heating internally, and is literally known as "water hammering." When water entering or leaving a tank is abruptly turned off, it can cause the pipes to shift, bang against studs or the interior of walls. This can be caused by a dishwasher or toilet bowl, or by a water pump without a holding tank. The noise is not dangerous to your water heater, but could lead to eventual wall damage if it is not corrected. Install a "water hammer arrestor" between the offending device and the water heater so you can prevent the noises from hot water heater.
Tank-less Water Heater Noise
Tank-less water heaters have their own distinct noises. If you hear a clicking noise, this is typically just the flow switch turning on and off to start and stop the flow of water and is completely normal. If it’s making a lot of noise when turned on, it may be because calcium deposits are being left behind due to hard water in your area. Installing a water softener system may be necessary. Others reasons for a noisy tank-less water heater model may be an issue with the burner, the fan may be dirty, or possibly a leak in the sealed combustion resulting in irregular gas combustion
Hearing noises from your hot water heater is a bit scary, especially if you’re looking at the possibility of the tank not working through a cold winter. Whatever the issue might be, we at Hot water tanks Edmonton, will be glad to help you out.