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Water Heater Making Noises — Popping, Rumbling & Hissing: What They Mean
Strange water heater noises in your Scarborough home are often the first warning sign before a costly failure. Here’s what each noise means.
Popping or Rumbling
Cause: Sediment buildup on the tank bottom. Mineral deposits from Toronto’s hard water accumulate over time. The heating element burns through the sediment, creating popping sounds.
Fix: Flush the tank annually. If sediment is severe and the heater is 8+ years old, replacement is more economical.
Hissing or Sizzling
Cause: Water dripping on the burner (gas heaters) or the heating element (electric). This typically means a leak from the pressure relief valve or internal tank.
Fix: Call immediately — a leaking water heater can cause significant water damage.
Banging (Water Hammer)
Cause: Sudden pressure changes when the water valve closes rapidly.
Fix: Install a water hammer arrestor on the supply line.
Why is my water heater making popping noises?
Popping noises from a water heater are caused by sediment buildup on the tank bottom. When the burner heats water trapped under the sediment layer, it creates a popping sound. Flush the tank annually to prevent this. If the heater is 8+ years old, replacement may be more cost-effective. Call Madina Mechanical at (416) 424-4328 for water heater service in Scarborough.
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Water Heater Service Scarborough: (416) 424-4328
