Your water heater plays a mostly silent but important role in your home. It heats water for showers, dishes, laundry, cleaning, and other daily tasks. However, like any major appliance, a water heater can develop problems over time. Some can be easily fixed, while others may happen as your system reaches the end of its lifespan.
Below, we will discuss some common signs of a failing water heater to help you prevent major inconveniences and avoid water damage.
Hot Water Runs Out Quickly
If you notice your household running out of water faster than usual, you may have a problem with your water heater. A traditional tank water heater may have a failing heating element, thermostat, or other component that keeps it from heating water properly.
If your household’s hot water needs have increased, you could just have an undersized water heater. A professional technician can help determine whether your system needs repaired, adjusted, or fully replaced.
Water Doesn’t Get Hot Enough
If the water from your tap or showerhead consistently feels lukewarm or fails to reach the expected temperature, you may need to check your water heater. An electric unit may have a faulty heating element or thermostat, and a gas system could have a problem with the burner, gas supply, thermocouple, or other components. There could also be heavy sediment buildup in the tank.
Before assuming you have a failing water heater, have a professional inspect the system and identify the cause.
You Hear Popping, Rumbling, or Banging Noises
Never ignore strange sounds coming from your water heater. Popping, rumbling, or banging noises can happen when sediment (a buildup of hard minerals, sand, grit, and bits of corroded metal) accumulates in the tank.
As sediment settles on the bottom of the tank, water can become trapped under the buildup. When water is heated, this trapped moisture produces popping or rumbling sounds. Over time, significant sediment buildup can reduce efficiency and place additional stress on your water heater.
Routine maintenance, including flushing the tank once a year, can help reduce sediment-related problems.
Water Looks Rusty or Discolored
If water comes out rusty or discolored, there may be corrosion somewhere in your plumbing system. If the discoloration only occurs when using hot water, your water heater is most likely the problem.
Traditional tank water heaters contain an anode rod designed to prevent the buildup of rust and corrosion. As this rod wears down, it may fail to protect your system from wear and tear.
A professional technician can help determine whether the issue involves the anode rod, the tank, or another part of the plumbing system.
You See Water Around the Tank
If you see a puddle or moisture around the base of your water heater, you could have a serious problem, such as a loose connection, faulty valve, or cracked or damaged tank.
A significant leak could mean you have a failing water heater that needs to be replaced. A small leak, while not an emergency, should be inspected as soon as possible to prevent water damage.
Your Water Heater Is Frequently Turning On and Off’
Frequent cycling can indicate a problem with the water heater’s controls, thermostat, heating components, or other parts of the system. This can affect energy use and make it hard for your system to maintain a consistent temperature.
If you notice unusual cycling, call a professional to inspect the system and determine whether you have a failing water heater in need of a repair or a unit in need of an adjustment.
You Smell Strange Odors
Unusual odors coming from hot water can have several potential causes. In some cases, bacteria can interact with the water heater’s components and cause a sulfur-like or rotten-egg smell. The anode rod can also cause unpleasant odors.
You should have persistent odors evaluated by a professional in case you have a failing water heater or significant problem.
Your Energy Bills Are Increasing
An unexplained increase in water-heating costs can sometimes indicate a reduction in efficiency. Sediment buildup, aging components, poor insulation, or other problems can cause your water heater to work harder to heat water.
Higher energy costs don’t automatically mean you have a failing water heater, but they could be a reason to schedule an inspection.
Don’t Get Stuck With a Failing Water Heater
A failing water heater often provides warning signs before it stops working completely. Paying attention to temperature inconsistencies, discoloration, sounds, odors, leaks, and overall performance can help you identify potential problems early, protect your home from water damage, and prevent unexpected hot water loss.
If you’re experiencing problems but can’t pinpoint the cause, schedule a professional inspection.
