Signs Your Water Heater May Be Failing
Water heaters do not always give you much warning before they fail.
Sometimes there are obvious clues: water on the floor, no hot water, or a pilot that will not stay lit. Other times the signs are subtle enough that homeowners live with them for months without realizing the water heater may be nearing the end of its life.
The important thing is knowing which symptoms are worth paying attention to, especially if you have an older tank.
1. The water heater is starting to leak
This is the biggest warning sign.
That does not mean every drop of water around a water heater means the tank has failed. Water can leak from a fitting, valve, supply line, or another replaceable component.
But if water is actually coming from the tank itself, particularly from underneath the tank, replacement is usually the answer.
Once the internal steel tank has corroded through, there is no practical repair.
If you find water around your heater, try to determine where it is coming from and take a few photos. We can often tell quite a bit just by looking at them.
2. You’re running out of hot water sooner than you used to
If the same household suddenly cannot get through the same number of showers without running out of hot water, something has changed.
With a tank water heater, sediment can accumulate over time and reduce the amount of usable hot water. There can also be problems with the burner, heating elements, thermostat, dip tube, or other components.
This does not automatically mean you need a new water heater.
But when reduced hot-water capacity starts happening on an older unit, it is worth looking at the age and overall condition of the heater before putting significant money into repairs.
3. The water heater is making noises it didn’t make before
Water heaters make some normal operating sounds, so a little noise is not necessarily a problem.
What gets our attention is when an older tank suddenly starts making loud popping, rumbling, banging, or crackling sounds.
One common cause is sediment collecting at the bottom of the tank.
In the Bay Area, water conditions vary considerably depending on where you live, so some homes experience mineral buildup more quickly than others.
Noise by itself does not mean the water heater is about to fail tomorrow. But if the unit is older and you’re hearing noises that were not there before, it is another piece of information to consider.
4. Your hot water is rusty or discolored
If you turn on the hot water and see brown, orange, or rusty-colored water, first compare it with the cold water.
If both the hot and cold water are discolored, the problem may be somewhere in the water supply or plumbing system rather than the water heater.
If the cold water is clear but the hot water is consistently rusty, corrosion inside the water heater becomes a possibility.
That deserves a closer look, particularly on an older tank.
5. You’re having repeated problems getting hot water
A water heater that stops producing hot water does not necessarily need replacement.
Gas water heaters can have problems with igniters, thermocouples, gas control valves, burners, or other components. Electric heaters have their own replaceable parts such as heating elements and thermostats.
The bigger question is how old the heater is and whether you are dealing with an isolated repair or the beginning of repeated problems.
Putting money into a relatively new water heater can make perfect sense.
Putting money into one repair after another on an old tank often does not.
6. There is visible corrosion around the heater
Take a look at the fittings, connections, top of the tank, and areas around the water heater.
A little surface discoloration on a fitting does not necessarily mean the water heater is failing.
But significant corrosion, particularly when combined with moisture or an older tank, should not be ignored.
Corrosion can help point us toward where water has been leaking and whether the issue is with a connection or the water heater itself.
7. The water heater is getting old
Age matters, but there is no expiration date stamped on a water heater.
Traditional tank water heaters commonly last somewhere around 8 to 12 years, but some fail earlier and some continue operating well beyond that.
We regularly see homeowners who have no idea how old their water heater is.
If that’s you, take a picture of the manufacturer’s label. The serial number can usually be used to determine when the heater was made.
An older water heater that is working perfectly does not automatically need to be replaced.
But an older water heater combined with leaking, corrosion, reduced hot-water capacity, or repeated repairs is a different situation.
That’s when it starts making sense to plan the replacement instead of waiting for the decision to be made for you.
Should you replace a water heater before it fails?
Sometimes.
If your heater is in a garage with good drainage, you may be comfortable letting an older unit continue working while keeping an eye on it.
If that same aging water heater is upstairs, inside a finished part of the home, or somewhere a leak could cause significant damage, you may have a much lower tolerance for waiting until it fails.
There is no rule saying you need to replace a water heater just because it reaches a certain age.
We prefer looking at the whole situation: age, condition, location, repair history, and any warning signs the heater is giving you.
Not sure how old your heater is or whether it needs replacement?
You don’t necessarily need to schedule someone to come to your house just to start figuring it out.
For a standard tank water heater, send Water Heater Boys a few clear photos of:
- The entire water heater
- The connections and venting at the top
- Any leaking, rust, or corrosion you see
- The manufacturer’s model and serial-number label
Also tell us your city and what the heater has been doing.
For many straightforward tank replacements, we can review the information and discuss your options and pricing by phone or text first.
If the situation requires an on-site evaluation, we’ll tell you that too.
Request an estimate or call Water Heater Boys at (650) 844-2305.