Water Heater Making Noise — Sediment or Boiling
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Common Water Issue in BC

Water Heater Making Noise — Sediment or Boiling

Popping, rumbling, or hissing from a water heater indicates sediment buildup or overheating. BC homeowners should address this before tank failure.

Possible Causes

  • Sediment buildup on bottom of tank causing popping sounds
  • Overheating from failed thermostat causing boiling sounds
  • Scale buildup on heating elements in electric heaters
  • Expansion and contraction of tank from temperature changes
  • Water hammer in supply lines amplified by tank

Recommended Steps

  • 1Flush water heater to remove sediment
  • 2Check thermostat settings and operation
  • 3If noise persists after flushing, heating elements may have scale buildup
  • 4Inspect T&P valve for discharge indicating overheating
  • 5Call professional if noise continues — tank may need replacement

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