To quickly check if your water heater is working, turn on a hot water faucet, let it run for three minutes, and touch the pipe leaving the top of the heater. If it is hot, your system is working. If it is cold, you will need to inspect the power source or pilot light.
5 Signs Your Water Heater Is Going Bad (And What to Do About It)
The first thing to check is your water heater's power or gas supply to ensure it is actively running.
To reset an electric water heater, turn off its power at the breaker box. Remove the upper access panel and insulation on the side of the tank to reveal the high-limit switch, then firmly press the red reset button until you hear a click. Replace the panel and restore power.
A water heater usually lasts between 8 and 12 years for traditional tank models, and 15 to 20 years for tankless models.
Signs your water heater is failing include pooling water around the base, rusty or foul-smelling hot water, and loud banging or popping noises. You should also watch for inconsistent water temperatures or a sudden drop in pressure, and check the manufacturer's label if your unit is more than 10–15 years old.
When searching for the most reliable water heater, professional plumbers consistently recommend A.O. Smith, Bradford White, and Rheem. For long-term tank durability and a "set-it-and-forget-it" experience, A.O. Smith and Bradford White are top choices. If you prioritize high-tech smart features and energy efficiency, Rheem is a market leader.
The longest-lasting water heater brands overall are A.O. Smith and Bradford White, which typically last 12 to 15+ years. For electric units, the Rheem Marathon stands out due to its non-metallic, seamless fiberglass tank that is designed to virtually never rust or leak, often lasting 20 to 30 years.
Step 1: Turn off Circuit Breakers
Safety first! Before touching the water heater, go to your electrical panel and shut off the circuit breakers that supply power to the unit.
The most common cause of no hot water is an issue with the water heater's power or fuel supply. For electric heaters, this is usually a tripped circuit breaker; for gas models, it is generally an extinguished pilot light or a malfunctioning thermocouple.
Yes, you can manually light a gas hot water heater, but it only applies to models with a gas control valve and a pilot light. Modern electric water heaters or tankless gas units cannot be manually lit.
As a result, tankless water heaters deliver a constant supply of hot water. You don't need to wait for a storage tank to fill up with enough hot water. However, a tankless water heater's output limits the flow rate.
Tripped Circuit Breaker: A very common reason for an electric water heater not working is a tripped circuit breaker. Fix: Reset the breaker and check for electrical system overloads. Faulty Heating Elements: Prevents heating. Fix: Replace faulty elements to restore heating efficiency.
Electric vs. Gas Safety Limits: With electric water heaters, minor external leaks may allow brief continued use, provided water isn't contacting any electrical components. For gas heaters, any gas smell or pilot light issues demand immediate shutdown and professional assessment.
9 Warning Signs Your Water Heater Might Be Failing
There isn't a single "number 1" model, as the ideal water heater depends on your home's setup, but top-rated brands dominating the market include Rheem (best overall tank/tankless) and A.O. Smith (best for durability and commercial-grade units).
How Long Does a Water Heater Typically Last? Water heater life expectancy depends on the type of system you have. Traditional tank water heaters typically last 8–12 years, while tankless water heaters can last 15–20+ years with proper care.
Running out of hot water after just 5 minutes is usually caused by a bad heating element, a broken dip tube, a failing shower cartridge, or simply exceeding your water heater's capacity.
For a 10-year-old tank water heater, repairing is usually only worth it if the problem is a cheap, minor part (like a thermostat or heating element), the repair costs under $200, and the tank has zero rust. If the repair exceeds $500 or the tank shows corrosion, replacement is the safer, more cost-effective choice.
A 10-minute shower typically uses 12 to 25 gallons of hot water, depending on your showerhead's flow rate and how hot you keep the water.
Pushing the reset button on your electric water heater restores power to the heating elements. This button acts as a high-limit safety switch, often called an ECO (Emergency Cut-Off) switch. It pops out to cut power and prevent scalding or damage when internal water temperatures rise above a safe limit.
Home Depot generally charges between $1,600 and $2,400 total for a standard tank water heater and installation. The labor itself typically ranges from $300 to $600 depending on the unit type, your location, and specific plumbing requirements. Tankless models run higher, averaging between $2,400 and $5,400 completely installed.
Bradford White water heaters are widely regarded as some of the most durable on the market. They come with an array of well-thought-out features that enable them to stand up to all kinds of wear and tear that results from regular use. Overall, they have a longer service life than Rheem water heaters.
When evaluating residential water heaters, the industry consensus and plumber recommendations highlight the following top five brands based on reliability, efficiency, and overall value: