Before calling a professional, check our comprehensive guide to common water heater issues. You might be able to identify or solve the problem yourself.
Issue 1: No Hot Water
Symptom: The water from your taps is completely cold.
For Gas Heaters:
- Check the pilot light. If it's out, follow the manufacturer's instructions to relight it.
- Check the gas valve to ensure it is turned on.
- Check the thermocouple. If it's dirty or faulty, the pilot light won't stay lit.
For Electric Heaters:
- Check the circuit breaker panel. Reset the breaker if it has tripped.
- Check the high-temperature reset button on the upper thermostat.
- The heating elements may have failed and need replacement.
Issue 2: Not Enough Hot Water
Symptom: The water starts hot but turns cold quickly.
- Thermostat Setting: Check if the thermostat is set too low. The recommended setting is 120°F.
- Sediment Buildup: Sediment in the tank can reduce its capacity and efficiency. Flushing the tank may resolve this.
- Broken Dip Tube: A broken dip tube mixes cold water with hot water at the top of the tank.
- Faulty Element (Electric): The lower heating element may be burned out.
Issue 3: Water is Too Hot
Symptom: The water is dangerously hot.
- Thermostat Setting: The thermostat may be set too high. Lower it to 120°F.
- Faulty Thermostat: The thermostat may be stuck in the "on" position and needs replacement.
Issue 4: Leaking Water Heater
Symptom: Water is pooling around the base of the heater.
- T&P Valve: The Temperature and Pressure relief valve may be faulty or releasing excess pressure.
- Loose Connections: Check the hot and cold water inlet/outlet pipes for loose connections.
- Drain Valve: Ensure the drain valve at the bottom of the tank is completely closed.
- Corroded Tank: If the tank itself is leaking, it usually means the inner lining has corroded. The water heater must be replaced.
Issue 5: Strange Noises
Symptom: Popping, rumbling, or banging noises from the tank.
- Sediment Buildup: The most common cause is sediment buildup at the bottom of the tank. As water heats, steam bubbles escape through the sediment, causing a popping or rumbling noise. Flushing the tank is highly recommended.