Gas, electric and hybrid heaters fail in different places
Knowing which type you own cuts the diagnosis time. The label on the tank shows fuel and voltage.
| Type | Parts that usually fail | Quick clue |
|---|---|---|
| Gas tank | Thermocouple, pilot assembly, gas control valve, flue draft | Pilot will not stay lit or burner flame is yellow |
| Electric tank | Upper or lower element, thermostat, high-limit reset | Lukewarm water, or water hot for only a few minutes |
| Hybrid heat pump | Condensate drain, fan, compressor, backup element | Error code and a damp pan under the unit |
| Any tank | Temperature and pressure valve, drain valve, inlet fittings | Drip at a fitting while the tank body stays dry |
| Any tank, 10 years or older | Tank shell itself | Water seeping from the base or through the insulation |
Gas smell or a scorched flue means stop and leave. Do not relight.
Water heater leak: where it comes from and what each source means
A leaking water heater is the most common call we hear, and the source decides everything. A drip from the temperature and pressure valve, the drain valve or a pipe connection is repairable. A leak from the tank bottom is not, because the steel liner has corroded through and no patch lasts.
Dry the tank top with a towel and watch where the first bead returns. If it forms at a fitting, tighten or replace that part. If the base is wet and the tank is past about ten years, price a replacement against a repair that may only last weeks.
Never cap or plug the relief valve. It is the one part that keeps an overheated tank from rupturing.
No hot water tonight: what to try first
These checks take minutes and sometimes solve the call without a part.
- 1
Check the breaker or gas valve
A tripped double-pole breaker is the classic cause for an electric unit. Reset it once, not repeatedly.
- 2
Press the high-limit reset
Electric tanks have a red button behind the upper panel. If it trips again, a thermostat or element is shorted.
- 3
Look at the pilot or igniter
On a gas unit, do not keep relighting if it will not hold. A weak thermocouple is a cheap part, but a draft problem is not.
- 4
Feel the pipes
Hot outlet pipe but cold at the faucet points to a mixing valve or crossover problem elsewhere in the house.
January in Mauldin and why heaters give out then
NWS Greenville-Spartanburg lists an average January low of 32.1 F and 16 January days at or below 32 F. Cold inlet water makes the burner or elements run longer, and a heater in an unheated garage, attic or closet loses heat faster. Insulating the first few feet of pipe and keeping the thermostat near 120 F eases the load, and it is the time of year to spot a weak element before it quits on a freezing morning.
Source type: NWS Greenville-Spartanburg 1991-2020 climate normals.
Soft water changes what a tank flush does
Greenville Water's year-to-date average hardness is 5.7 mg/L, which is very soft. Scale on elements and burner chambers builds slowly here, so a dead element is less likely a scale problem and more likely plain age or a dry-fire. Sediment still collects from the supply line.
A yearly drain of a few gallons from the tank bottom still clears what settled, so a tank flush is cheap upkeep, though it matters less than in mineral-heavy areas. Tankless units follow the same logic, and a yearly flush is still worth doing (see tankless water heaters).
What a water heater repair costs and what shifts it
Typical U.S. repairs run about $150 to $450 for a thermostat, element, thermocouple or valve. A replacement tank installed usually falls between $1,200 and $2,500. Your exact figure comes from a call.
Call (855) 575-2890 for a clear price before work starts, same-day when a slot is open. Repair is the right call when a part is the only failure and the tank is under about eight years old. Past ten, put the money toward a new unit.
Water heater repair questions from Mauldin homeowners
Yes. The line at (855) 575-2890 runs at all hours, and a flooding tank at 3 a.m. gets the same attention as a weekday call. No arrival time is promised, but you hear whether a same-day visit is open.
Sometimes. A drip at a valve or fitting is a quick fix. Water from the tank base means the liner has failed and replacement is the sound option.
Most last about 8 to 12 years. Very soft supply water slows scale, but age and sediment still wear the tank down.
If the repair costs more than about half a new unit, or the tank is past ten years, replacement usually saves money. Ask the plumber for both numbers.
Permit rules vary, so ask the Mauldin Building and Zoning office at (864) 234-3475. The city says a permit is required before you add, alter or replace any plumbing system.
Sediment on the bottom traps steam bubbles. A flush often quiets it. If it keeps up after a flush, have the tank inspected.
Yes. The same dispatch line covers Simpsonville and other nearby areas.