What's it doing, and what does that mean?
Water heaters fail in a small number of recognizable ways. Find yours below, then weigh it against the unit's age — that date is encoded in the serial number on the label, and we can read it off in a minute.
| Symptom |
Likely cause |
Repair or replace |
| No hot water at all |
Gas: pilot out or a dead thermocouple. Electric: tripped high-limit or failed upper element. |
Repair — cheapest parts on the unit |
| Not enough hot water |
Broken dip tube, failed lower element, or sediment eating usable volume |
Repair, unless the tank was undersized to begin with |
| Rumbling or popping |
Hard-water sediment on the tank bottom, burner firing through it |
Flush it — but past ten years the noise is a countdown, not a fix |
| Rusty or brown hot water |
Anode rod consumed, steel lining corroding behind it |
New anode if caught early; new heater if the rust is daily |
| Water at the base |
T&P discharge, a loose connection, a bad drain valve — or the tank |
Depends which. See below. |
| Pilot won't stay lit |
Thermocouple, dirty pilot orifice, plugged flame arrestor screen, or a finished gas valve |
Repair — though a gas valve changes the math on an older tank |
Where is the water actually coming from?
This is the most useful thing you can work out before we get there, and it takes a towel. Dry the floor and the pan, put paper down, and watch where the first wet spot shows up.
Four of the five sources are repairs: a T&P valve discharging because it’s failing or pressure is high, a weeping supply connection at the top that runs down the side and reads like a tank leak from three feet away, a plastic drain valve that didn’t reseat after a flush, or a garage unit sweating on a cold morning. The fifth is the one nobody wants: water seeping from the tank body, a wet seam or a wet spot centered under the tank with everything above it dry. The steel has rusted through from inside, and there’s no patch for that. If the water is nowhere near the heater, you may be chasing a slab leak.
When is a repair throwing money at it?
Past roughly the ten-year mark, with a tank leaking from the body rather than a fitting, repair is throwing money at it. That's the honest line, and we hold it even though a repair invoice is easier to sell than the replacement conversation.
A water heater is a steel tank with a glass lining, and everything bolted to it is replaceable. Once the lining fails, the tank is a consumable that’s been consumed: a new gas valve on a twelve-year-old vessel is a good part on a bad tank. Between eight and ten it’s a judgment call on which part failed, what the anode has left, and where the unit sits. A garage tank with a floor drain gets more benefit of the doubt than one over your bedroom.
Below eight years, repair is almost always right. Thermocouples, elements, thermostats, and relief valves are wear items, and replacing a whole heater over one of them is what gives this trade its reputation.
Why do these parts fail early in Ellis County?
Hard water, mostly. DFW water carries enough calcium and magnesium to bury a tank bottom in sediment and eat the sacrificial anode rod years early. The burner fires through a layer of insulation it was never designed for, and once the anode is gone the lining corrodes on its own.
Cold is the other one. A freeze like February 2021 puts pilots out and splits supply lines to garage and attic units, leaving a heater that’s fine and a water line that isn’t. If you’re calling after a freeze, tell us whether other fixtures still have pressure; it changes what we bring.
Most repairs finish on the first visit; the common parts ride on the truck. Call (469) 505-8362 and describe what it’s doing. If the tank has already let go, shut the cold supply valve at the top of the heater first: that’s an emergency plumbing situation, and stopping the water beats diagnosing anything.