7 signs your water heater is dying.
Water heaters don't usually die without warning. They whisper for months — then flood the garage on a Saturday night. Here's what to watch for, and exactly when to call it.
The 2-minute water heater check
Flashlight, ears, nose, and your calendar:
- Eyes — look at the base for water, rust streaks, or mineral crust
- Ears — rumbling, popping, or banging when it heats
- Nose — rotten-egg smell from the hot side only
- Calendar — the sticker on the tank shows the install date; past 10–12 years, start planning
The 7 signs, plain as day.
Spot one of these? Don't panic — but don't ignore it either. Most of these mean the clock is ticking, and the ones at the bottom mean it's already rung.
Rusty or discolored hot water
Run the cold tap — clear. Run the hot tap — brown or rusty. When only the hot side is discolored, the inside of the tank itself is rusting, not your pipes. That's a tank problem, and tanks don't heal.
Rumbling or popping
Sediment has baked onto the bottom of the tank. Water gets trapped underneath it and boils — that's the rumble. The heater works harder, heats slower, and dies sooner. Annual flushing prevents this; years of neglect cause it.
Water pooling at the base
A leak at the bottom of the tank means the tank wall is failing from the inside. This one doesn't get better and it doesn't stay the same — it gets bigger, and then it floods. The loudest warning on this list.
Hot water runs out fast
Shower starts hot and goes lukewarm halfway through? Sediment has eaten the tank's usable capacity, or the burner/element can't keep up anymore. Either way, the heater can't do its one job.
It's over 10–12 years old
Check the sticker on the tank for the install date. Most tank heaters live 8–12 years. Past that, you're on borrowed time — and a planned replacement on your schedule beats a flooded garage on the heater's schedule.
The pilot won't stay lit (gas)
A pilot that keeps dying usually means the thermocouple is going bad, or the burner assembly is struggling. Either way, a gas heater that can't stay lit is the unit telling you it's tired.
Rotten-egg smell from the hot side
Smell it only in the hot water? That's the anode rod reacting with bacteria inside the tank. Annoying, but fixable. Smell gas around the unit itself? That's different — leave the house and call the gas company.
The truth about water heater repairs.
Two things we won't sugarcoat — and one that buys you years.
Anyone selling you a tank patch is selling fiction
Once the steel tank wall rusts through, it's done. Sealants and patches don't hold on a pressurized vessel that heats and cools every day. The honest fix is a new heater — we'll tell you that straight, even though it's the more expensive answer.
Sediment is the slow killer
Draining a few gallons off the bottom once a year clears the sediment behind the rumbling, the slow heating, and the early death. Five minutes, once a year, buys real years of life.
Bigger isn't always better
An oversized heater wastes energy keeping hot water nobody uses. Tell us how many people live in the house and we'll size it for your actual mornings — not the brochure.
When to call a plumber.
Some of these signs mean "plan ahead." These three mean "call now":
Any water at the tank base
Water pooling around the bottom of the heater means the tank is failing. Put a pan or towels under it and call — this is the sign that floods garages.
No hot water at all
Cold showers with no warning — dead element, dead gas valve, or a dead tank. We'll tell you straight whether it's a repair or time for a new unit, with a flat-rate price before we touch anything.
You smell gas near the unit
Rotten-egg smell around the heater itself on a gas unit is not an anode-rod issue — leave the house first, call the gas company second, then call us. Your safety outranks the schedule.
Water heater FAQ
Straight answers, no sales pitch.
How long does a water heater last?
Most standard tank water heaters last 8 to 12 years. Past 12, you're on borrowed time — plan the replacement on your schedule instead of the heater's, because heaters love to fail on Saturday nights.
Why is only my hot water rusty or discolored?
If the cold water runs clear and the hot water runs brown, the inside of the tank is rusting — not your pipes. A rusting tank wall can't be repaired; it's a replacement, not a patch job.
Should I flush the sediment out of my water heater?
Yes — draining a few gallons off the bottom once a year clears the sediment that causes rumbling, slow heating, and early death. One honest caveat: if the heater is very old and has never been flushed, stirring it up can open a leak, so leave that one alone and plan a replacement.
My hot water smells like rotten eggs — is it dangerous?
If it's only the hot side, it's the anode rod reacting with bacteria in the tank — annoying, not dangerous, and we can fix it. If you smell gas around the unit itself on a gas heater, that's different: leave the house and call the gas company first.
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