Water Heater Problems
Water heaters typically last 10-12 years. Here's how to identify common problems and decide between repair and replacement.
Warning Signs Your Water Heater Is Failing
Age Over 10 Years
Check the serial number on your tank — first 4 digits often indicate manufacture date. Over 10 years? Start planning for replacement even if it's working.
Rusty or Discolored Hot Water
Rust-colored water from hot taps (not cold) means the tank is corroding internally. The anode rod may be depleted, or the tank itself is rusting through.
Rumbling or Popping Noises
Sediment buildup at the bottom of the tank hardens and pops when heated. This makes the heater work harder and accelerates wear.
Water Pooling Around the Base
Check connections and the relief valve first. If the tank itself is leaking, it cannot be repaired — the tank has corroded through and replacement is required.
Inconsistent Water Temperature
Water going hot-cold-hot or never getting fully hot often indicates a failing heating element, thermostat issue, or sediment insulating the heating element.
Slow Recovery Time
If the tank takes much longer to reheat after use than it used to, efficiency is declining — often due to sediment, failing elements, or a broken dip tube.
Repair vs. Replace
Usually Repairable
- • Thermostat replacement
- • Heating element replacement
- • Pilot light / thermocouple
- • Pressure relief valve
- • Dip tube replacement
Usually Means Replacement
- • Tank is leaking
- • Major internal corrosion
- • Multiple concurrent problems
- • Unit over 10-12 years old
- • Repair costs exceed 50% of replacement
The 50% Rule
If repair costs exceed 50% of replacement cost, and the unit is over 8 years old, replacement is usually the smarter investment.
Water Heater Lifespans
Actual lifespan depends on water quality, maintenance, and usage patterns.