Few things are more frustrating than running out of hot water midway through a shower or while doing dishes. If your water heater isn’t keeping up with your household’s needs, it’s more than just an inconvenience—it could be a sign that your system needs attention. Understanding what’s behind the issue can help you prevent bigger problems and restore reliable comfort to your home.

1. Sediment Buildup in the Tank

Over time, minerals in your water supply—especially if you have hard water—can settle at the bottom of your water heater tank. This sediment buildup acts as a barrier between the heating element and the water, making it harder for your unit to heat efficiently. You might notice fluctuating water temperatures or hear popping and rumbling noises from the tank.
Flushing your water heater annually can help clear out sediment and improve both performance and efficiency.

2. Faulty Heating Elements or Burners

For electric water heaters, heating elements are responsible for warming the water inside the tank. When one or both elements fail, your system may struggle to produce enough hot water.
In gas units, the problem could stem from a dirty or malfunctioning burner, preventing proper ignition and heat transfer. A professional inspection can identify whether components need cleaning, repair, or replacement.

3. Thermostat Set Too Low

Sometimes, the solution is simple. If your thermostat setting is below 120°F, your water may not reach the desired temperature. However, be careful not to raise it too high, as that can increase energy costs and risk scalding.
If adjusting the thermostat doesn’t help, it may be a sign that the thermostat itself is faulty and needs to be replaced.

4. Undersized Water Heater

If your household has grown or your hot water use has increased, your water heater may simply not be large enough to keep up. Showers, laundry, and dishwashing can quickly deplete a smaller tank’s supply.
A professional plumber can assess your home’s usage and recommend whether upgrading to a larger tank—or switching to a tankless water heater—would better suit your needs.

5. Age and Wear

Most traditional water heaters last around 8–12 years. As they age, efficiency declines, and parts begin to wear out. If your unit is nearing the end of its lifespan, frequent repairs or inconsistent heating may indicate it’s time for a replacement.

When to Call a Professional

If you’ve ruled out simple fixes like adjusting the thermostat or flushing the tank, it’s best to have a licensed plumber inspect your system. Ignoring early warning signs can lead to higher utility bills, water damage, or complete system failure.

Restore Reliable Hot Water with New Image Plumbing & Rooter

You don’t have to live with lukewarm showers or unpredictable hot water. The experts at New Image Plumbing & Rooter can diagnose the problem, repair or replace your water heater, and ensure your system runs efficiently.
Call New Image Plumbing & Rooter today at (626) 788-8260 to schedule a service and enjoy dependable hot water again.