Delonghi Air Conditioners - Blogs & Forums On AC & Electric Heat Pumps

Blog Title: water heater makes a pop and bang noise

Main Que: Our water heater makes a pop sound, what is that?

  • Category: Noritz Water Heater General Faq's
  • Query By: GLORIA MORRIS (San Leandro, CA)
  • Date: 08/29/2013

Answer: "These sounds are caused by the buildup of hard water sediment heating up and exploding inside the tank. You can flush out the tank yourself, although by the time you’re hearing this sound the sediment chunks may be too large to pass through the drain valve. "

  • Replied By: LILLIE LYONS (Costa Mesa, CA)
  • Replied Date: 09/02/2013