Even if you are still getting hot water, it may be time to replace your hot water heater. You can look for several signs that will let you know if your hot water heater is bad. Waiting too long to replace your hot water heater if it has gone bad can lead to a slew of problems, including no hot water and a hot water heater that bursts.
Look over your records to see when you purchased the hot water heater. The average lifespan of a hot water heater can be anywhere from 8 to 15 years depending on the model that you bought. After this period, it will likely start to have problems and need replacing.
Check for signs of corrosion on the body of the hot water heater. If any of the metal of the tank has rusted through, then your hot water heater needs to be replaced. Other signs of corrosion include the presence of rusty water underneath the hot water heater or rust-colored water flowing through the tap of your faucets.
Determine the efficiency of your hot water heater. If you start to have less hot water without adjusting the heater's temperature, this is a sign that the water heater is suffering from a malfunction.
Replace a hot water heater if you notice moisture around the unit. You may have a slow leak that will worsen over time if the hot water heater is not replaced. A flooded area is another indication that the unit is beyond repair.
Examine the burner components of the hot water heater. As a hot water heater goes bad, the different burner pieces become clogged and rusty. You can check these parts by removing the front cover of the hot water heater.