Dip Tube Failure: A Hidden Cause of Lukewarm Water
When hot water turns lukewarm and runs out fast, a cracked dip tube is an overlooked culprit. Here's how it works.
Read more →When to Replace an Electric Water Heater Element
Most 'electric water heater not heating' calls come down to one part: a burned-out heating element. Here's the rundown.
When an electric water heater stops delivering—or only delivers lukewarm water—the culprit is usually a heating element. Most electric tanks have two, and how they fail produces telltale symptoms.
How elements work
An electric tank has an upper and a lower heating element, each controlled by its own thermostat. The lower element does most of the work; the upper handles the top of the tank and quick recovery. Either can burn out over time, especially with sediment buildup.
Symptoms by which element failed
- No hot water at all → often the upper element or its thermostat
- Hot water that runs out fast / lukewarm → often the lower element
- Takes forever to reheat → a partially failed element
Why elements fail
- Normal wear over years of cycling
- Sediment caking the lower element and causing it to overheat
- Dry-firing (powered while the tank was drained)
- Mineral scale in hard water
Sediment is the hidden killer of lower elements. Annual flushing protects them—another reason maintenance pays off.
Diagnosis and replacement
A technician tests each element and thermostat with a meter to pinpoint the failure, then replaces the bad element. It's a common, affordable repair—far cheaper than a new unit on a heater that's otherwise sound. Learn more on our heating element page.
Repair or replace?
On a unit under about 8 years, replacing an element is well worth it. On an older tank with other issues, it may be time to consider replacement. We'll give you a straight answer. Call 973-834-8833.
Good to Know
Frequently Asked Questions
Why is my electric water heater only making lukewarm water?
Usually a failed lower heating element or thermostat. The upper element heats the top of the tank, so you get some warmth but it runs out fast.
Is replacing a heating element worth it?
On a relatively young tank, yes—it's an affordable repair. On an old unit with other problems, replacement may make more sense.
Need a hand from a licensed NJ water heater pro? Hot Water NJ installs, repairs, and replaces every type of water heater across Northern New Jersey—usually same day. Call 973-834-8833 or request a free estimate below.