When a water heater quits or runs short, the cause is often one worn part, such as a heating element, thermostat, thermocouple or relief valve, and a plumber can usually swap it. A leak from the tank shell is different and means the heater needs replacing. Call the number on this page to be connected with a local plumber in Durham.

What you can check yourself
For an electric heater, see whether its breaker has tripped. For a gas heater, check whether the pilot is out and, if so, relight it only by following the instructions printed on the unit. Stop there. Electric units run on 240 volts, and gas valves and vents are best left to a professional. If the relief valve is discharging, never cap or plug it; it protects the tank from building too much pressure.
Matching the symptom to the part
- No heat at all, electric: a failed element, a bad thermostat or a high-limit switch that has tripped.
- No heat at all, gas: the pilot, thermocouple, flame sensor or gas control valve.
- Hot water fades quickly: one of two elements out, a cracked dip tube, or a thick sediment layer.
- Knocking or popping: sediment cooking on the tank bottom.
- Water on the floor: a loose connection or drain valve, which can be repaired, or a failed tank, which can't.
Durham water and odd tastes or smells
The City of Durham disinfects with chloramines and adds orthophosphate to limit pipe corrosion. Durham doesn't publish a hardness figure in its 2024 water quality report, so it is hard to say how fast scale builds in a given tank. Sediment still settles over time, and draining a few gallons from the bottom valve now and then is reasonable upkeep. A rotten-egg smell only from the hot taps usually points to the tank's anode rod, which a plumber can change.
Fix it or move on?
The U.S. Department of Energy puts a storage water heater's life at 10 to 15 years. A young heater with a dry tank is usually worth repairing. An older one that needs an expensive control, or any tank leaking from the shell, is usually a candidate for replacement instead. The manufacture date is on the label, and the plumber can read it for you.
What sets the repair price
The part, the fuel type, where the heater sits (attics and tight closets add time) and when the visit happens. Ask for the diagnosis and a price before work begins.
Water Heater Repair questions from Durham homeowners
Why is there no hot water from my electric heater?
Why does my hot water smell like rotten eggs?
How hard is Durham's water?
Is it worth repairing a 12-year-old water heater?
Related plumbing services in Durham
Helpful guides
Water Heater Repair in nearby cities and towns
Durham County
Orange County
Chatham County
Granville County
Person County
Sources
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