Free Diagnostic Tool
Water Heater Troubleshooting
Answer a few questions about your symptom — get a step-by-step repair guide or an honest replace recommendation backed by 15+ years of field experience.
Common Water Heater Questions
Why does my water heater have no hot water?
The most common causes are: (1) for gas units, an extinguished pilot light or failed thermocouple; (2) for electric units, a tripped circuit breaker or burned-out heating element; (3) for both, a thermostat set too low. Check the pilot light or breaker first — those are free fixes. A replacement heating element costs $20–$50 and takes about an hour to swap.
Why is my water heater making popping or rumbling noises?
Popping and rumbling sounds are caused by sediment (calcium and magnesium mineral deposits) accumulating on the tank floor. As water heats beneath the sediment layer, steam bubbles pop through it. Flushing the tank annually prevents buildup. If the unit is over 10 years old and the sediment is thick, replacement is usually more cost-effective than a flush.
What causes rusty or discolored water from a water heater?
Rusty or brown hot water almost always signals a depleted anode rod — a sacrificial magnesium or aluminum rod designed to attract corrosion away from the steel tank. Replacing it ($30–$60 in parts, 1 hour of work) can add 5+ years of life. If the tank itself has corroded through (rust appears in cold water too, or there's a visible bottom leak), replacement is the only fix.
When should I replace instead of repair my water heater?
Replace rather than repair when: (1) the unit is 10–15+ years old; (2) the tank itself is leaking (not just fittings); (3) repair cost exceeds 50% of a new unit's price; (4) this is the second or third repair in two years. A new efficient heat pump water heater typically pays for itself in lower energy costs within 3–6 years.
Is a water heater leak dangerous?
It depends on where the leak originates. A drip from pipe fittings or connections is usually not immediately dangerous but should be fixed promptly. A leak from the T&P (temperature and pressure) relief valve means internal pressure is too high — a potential safety hazard requiring same-day attention. A leak from the bottom of the tank indicates internal corrosion and the unit must be replaced promptly to prevent flooding.
How long does a water heater last?
Tank water heaters (gas or electric) typically last 8–12 years with annual maintenance — flushing sediment and replacing the anode rod every 3–5 years. Tankless units last 15–20 years. Heat pump water heaters generally last 12–15 years. Once past these ages and showing symptoms, repair costs are rarely justified versus the efficiency gains of a modern replacement.