Popping and rumbling
Minerals from hard water settle at the bottom of the tank. Water trapped under the sediment boils and pops. Flushing the tank once a year prevents this; once sediment is thick, it insulates the burner, wastes gas and overheats the steel.
Hissing or sizzling
Usually condensation dripping on the burner, or — more seriously — a small leak. Check the floor around the tank and the pressure relief valve.
Screeching or high-pitched whine
Restricted water flow through a partially closed inlet valve or a failing heating element on electric units.
Is it time to replace?
A noisy heater over 10 years old with rusty water or any sign of leaking should be replaced before it fails and floods. A noisy younger unit usually just needs a flush and anode rod check.
Need a plumber for this?
MGA Plumbing provides water heater repair 24/7 in every Missouri city — Kansas City, St. Louis, Springfield, Columbia and hundreds more. Upfront pricing, same-day service. Call (888) 480-9811.