How To Check The Elements In A Water Heater

When hot water becomes inconsistent or runs out too quickly, the heating elements inside the tank are often part of the problem. Understanding how to check elements in water heater systems from a technician’s perspective can help you know what is happening behind the scenes during a service call.

Electric water heaters rely on internal components that heat water in stages. When one element stops working, performance drops, and the issue can show up in different ways depending on which part fails.

At Water Heaters Now, we handle these issues every day with fast, accurate diagnostics and same-day water heater service across the Twin Cities metro area.

What Heating Elements Do Inside the Tank

Heating elements are installed through the side of the tank and extend into the water. When powered, they generate heat and transfer it directly into the surrounding water.

Most systems have an upper and a lower element. The upper element heats the top portion first. Once that section reaches the set temperature, the lower element begins heating the rest of the tank. This sequence allows the system to recover and maintain a steady supply of hot water.

When one element fails, the heating cycle is disrupted, leading to noticeable changes in performance.

When Professionals Suspect Element Problems

Before any testing begins, a water heater technician pays close attention to how the system is behaving. Patterns in performance often point toward a specific issue.

• Water never reaches the desired temperature
• Hot water runs out faster than expected
• Temperature fluctuates during use
• Breaker trips linked to the water heater

These signs help guide the inspection and narrow down which component needs attention.

How Technicians Prepare for Testing

Safety is always the first step. Licensed and certified water heater experts begin by shutting off power at the breaker panel and confirming that no electricity is flowing to the unit. This step protects both the technician and the equipment.

Next, the access panels on the side of the tank are removed. Behind these panels are insulation layers and protective covers that shield the internal wiring and element terminals. Once exposed, the technician can begin evaluating the components.

At this stage, wires connected to the heating element are carefully disconnected. This isolates the element so that readings taken during testing are accurate.

The Testing Process Explained

Technicians use a multimeter to measure resistance across the element terminals. This reading shows if the element is still functioning or has failed.

• A working element usually produces a resistance reading within a normal range
• A reading that shows no continuity points to a burned-out element

In addition to resistance, technicians also check for grounding issues. This involves testing between the element terminal and the metal tank. If a reading appears here, it signals a fault that can affect performance and safety.

These tests give a clear picture of the condition of each element without needing to remove it from the tank.

Identifying Upper Vs Lower Element Failure

The way a system behaves can often indicate which element is not working. Professionals use these patterns to guide their diagnosis.

If the upper element fails, the tank may not heat properly at all, leading to little or no hot water. If the lower element fails, the top of the tank may still heat up, but hot water will run out quickly during use.

This distinction helps pros move quickly through the testing process and confirm the issue.

What Happens After Diagnosis

Once a faulty element is identified, replacement is the standard solution. Heating elements are sealed components, so repair is not part of the process.

A technician will remove the damaged element, install a new one that matches the system specifications, and restore power to test performance. They may also check related parts such as thermostats to confirm the system is working as expected.

Minneapolis–St. Paul Water Heater Installation & Repair Experts

If your water heater is not performing like it used to, it may be time to bring in an expert to take a closer look. At Water Heaters Now, water heaters are all we do. Our team has replaced thousands of systems over the past decade and is the largest installer of professional-grade water heaters in the Twin Cities metro area.

We offer same-day service, fast installation by licensed and certified technicians, and high-quality equipment built to last. If your system needs repair or replacement, we’ll get your hot water back up and running without the hassle.

Get a quote.