If a water heater has stopped producing hot water, check that the breaker has not tripped or that the gas shutoff at the unit is open. If that is fine, or if you see water or smell gas, call. Our 24/7 dispatch handles heater emergencies at night and on holidays, and you can keep the cold supply on while you wait.
Symptoms and what they usually mean
Different complaints point to different parts. Each of the symptoms below is something we diagnose every week.
Common heater symptoms
- No hot water at allA tripped breaker, failed heating element or thermostat on an electric tank, or a pilot or thermocouple failure on gas.
- Lukewarm water that runs out fastA burned-out lower element or a heavy layer of sediment around the burner.
- Popping or rumbling noisesMineral scale at the bottom of the tank boiling under the water.
- Dripping from a side valveA failed temperature and pressure relief valve or excess pressure in the system.
- Rusty or brown hot waterAnode rod depletion or corrosion inside the tank.
How the diagnosis works
We start by confirming the fuel or power is actually reaching the unit. On an electric tank, the plumber checks the elements and thermostats with a meter. On a gas unit, we look at the gas control valve, the thermocouple or flame sensor and the draft.
A repair is worth doing when the tank itself is sound. A leak from the tank body is not repairable, and at that point the conversation is about replacement, not repair. A plumber should say which one it is before parts are ordered.
Repairs that save a tank
- Replacing an upper or lower heating element on an electric heater
- Replacing a thermostat, high-limit reset or wiring connection
- Replacing a thermocouple, flame sensor or gas control valve on a gas heater
- Swapping a failed temperature and pressure relief valve
- Flushing sediment from the tank and checking the anode rod
- Adding or replacing an expansion tank when pressure is the cause
An expansion tank matters more than most owners expect. When a closed water system heats water, the pressure has nowhere to go and the relief valve drips. Adding a small expansion tank solves what looks like a failed valve.
Gas heater safety first
If you smell gas near the heater, do not relight the pilot. Leave the building, then call the gas utility or 911 from outside, and call us after the utility says it is safe. Never promise yourself that a pilot problem is trivial when you smell fuel.
Carbon monoxide is the other gas-heater risk, especially when a flue is blocked or a unit is back-drafting. A working CO alarm near the bedrooms is basic protection, and the plumber checks the draft at the end of any gas repair.
Repair costs and the age rule of thumb
Parts like thermostats and elements cost little compared with a new tank. The decision turns on age, condition and repair history, so the plumber usually shares the tank's build year.
| Tank age | Problem | Common recommendation |
|---|---|---|
| Under 6 years | Element, thermostat, valve | Repair |
| 6 to 10 years | Single part failure, no leaks | Repair and note the age |
| Over 10 years | Second repair in a year | Plan a replacement |
| Any age | Water leaking from the tank body | Replace now |
What affects a water heater repair bill
Parts and time vary by the heater type and which part has failed.
What moves the price
- Part and brandElements, thermostats and gas valves vary widely by manufacturer.
- Heater typeGas, electric and power-vent units each need different parts.
- AccessA tank in a tight crawlspace takes longer to service.
- Sediment conditionA heavily scaled tank may need a flush on top of the repair.
- After-hours timingEmergency dispatch outside regular hours is priced accordingly.
Insurance rarely covers a worn part. If the heater leaked and damaged flooring, the water damage may be covered, so photograph the area first.
Want the number for your house? Call (339) 216-9771 and describe what you see.
Repair calls around Hingham and the South Shore
A repair call can mean a heater in an 1800s house near Hingham Harbor or one in a newer home off Derby Street. In both, the plumber begins by reading the data plate and checking local permit rules for any part that changes the gas or plumbing. Replacing a faucet, valve or working part is not treated as a minor repair under the state fact sheet, so ask your plumber if a permit applies.
We cover ZIP codes 02043 and 02044 in Hingham, plus 02025 Cohasset, 02061 Norwell, 02045 Hull and the four Weymouth ZIPs 02188 to 02191. Hull homes in low coastal blocks have a particular concern with damp basements and rust on tank bases, so mention any recent flooding when you call the 24/7 line.
What to do when a heater fails
- Turn off power or gas to the heater
- Close the cold water valve if it is leaking
- Do not touch hot pipes or the relief valve discharge
- Leave the house and call the gas company if you smell gas
- Photograph the label so we can bring the right part
According to the Massachusetts plumbers and gas fitters consumer fact sheet, replacing a working part is not a minor repair, so a part swap on a heater can still need a permit. Ask before work begins.
Questions homeowners ask
On an electric tank it often means the lower element has failed. On a gas tank, sediment can insulate the water from the burner.
Yes. We answer 24/7 for no-hot-water and leaking-heater calls in Hingham, including nights and weekends. Shut off the power or fuel and cold supply if water is escaping, then call.
Scale at the bottom of the tank traps water that boils under the sediment. A flush can help, but a very old tank may be near the end of its life.
It is a warning. A valve that keeps dripping means the tank is overheating or over pressure, and it should be checked before it fails.
Often yes. The thermocouple, flame sensor or gas valve is the usual cause. If you smell gas, leave first and call the gas utility.
A leaking tank, rusty water from an old tank or repeated repairs point toward replacement. The plumber will tell you which side of the line you are on.