Water Heater Repair in Houston
Nearly every water heater problem in this area traces back to one thing: hard water and the sediment it leaves behind. Here is what each symptom means, and the cheap maintenance job almost nobody does.
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Houston water is hard, and that is the whole story
Most water heater failures in this area trace back to one thing: dissolved minerals. Houston water carries enough calcium and magnesium that sediment builds in the bottom of a tank steadily, and everything that goes wrong downstream follows from that.
- Rumbling or popping when the burner runs is steam escaping from under a sediment layer. It is the classic sign.
- Slower recovery — hot water running out sooner than it used to — is sediment insulating the burner from the water.
- Higher gas or electricity use for the same hot water, same cause.
- Premature tank failure, because sediment holds heat against the tank bottom and accelerates corrosion.
Flushing the tank once a year is the single highest-value maintenance task on a Houston water heater, and almost nobody does it. A tank flushed annually will typically outlast one that never is by several years.
What the symptom usually means
| Symptom | Likely cause |
|---|---|
| No hot water at all, gas unit | Pilot or thermocouple, or the gas control valve |
| No hot water at all, electric | Failed heating element or thermostat, or a tripped high-limit switch |
| Runs out fast | Sediment, a failed lower element, or a tank undersized for the household |
| Rumbling or popping | Sediment. Flush it |
| Rusty or discoloured hot water | Anode rod spent, or the tank is corroding internally |
| Water around the base | Could be a fitting, the drain valve, or the tank itself. The last one is not repairable |
The anode rod nobody mentions
Inside every tank water heater is a sacrificial anode rod — a metal rod designed to corrode so the tank does not. It is consumable. When it is gone, the tank starts rusting from the inside.
Replacing an anode rod costs a fraction of a new water heater, and on a tank that is otherwise healthy at six or seven years it can add years of life. It is almost never offered, because it is a small job with a small invoice. Ask about it.
Repair or replace
Tank water heaters generally last eight to twelve years, and hard water pushes that toward the lower end.
- Under eight years: repair is usually right. Elements, thermostats, valves and anode rods are all straightforward.
- Eight to twelve: depends on the repair. A thermostat, yes. A leaking tank, no.
- A leaking tank at any age is replacement. The tank cannot be repaired, and a slow leak becomes a fast one without warning.
Worth knowing before you call
- Gas or electric, and how old — the date is on the serial number label.
- Tank capacity in gallons.
- Whether the water is discoloured.
- Whether there is water on the floor, and whether it is at the base or at a fitting above.
- Whether it has ever been flushed.