7 Reasons Why Your Hot Water Heater Is Leaking


When it comes to a hot water system, one of the most common issues homeowners face is a leaking water heater. Not only can this lead to a large mess in your home, but it can also be a sign of serious underlying problems with your system. Below are some potential causes of your water heater leaking and what you need to know to fix the problem quickly and safely.

1. Condensation

If you see water on the floor around your water heater, you may wonder if you have a severe problem. Before calling a professional technician, you may want to check that the water does not result from condensation. The difference between the air temperature and the hot water tank may cause condensation in a cool place like a basement.

To check if condensation is causing water issues, turn off your water heater and wipe up the water on the floor and tank. Wait several hours to determine if there is a leak when your system is off. You can then turn the system back on and look for leaks. If there are none, you know condensation was the cause of the water issue. Having a professional technician wrap your water heating in insulation will most likely reduce moisture buildup and may increase the efficiency of your system.

2. Temperature and Pressure Relief Valve Issues

The temperature and pressure relief (TPR) valve on your water heater is designed to protect it from over-pressurization when temperatures rise too high. If this valve isn’t sealed correctly or it is malfunctioning, it can cause leaks around the TPR valve itself. The valve is usually located on the side of your water tank near the top. Replacing a faulty TPR valve is most likely an easy fix and should be performed by an HVAC technician.

3. A Corroded Tank

Corrosion happens when metal components are exposed to water and oxygen over a long period. In most cases, your water heater’s tank is made of steel. Steel can rust and start to leak if not properly maintained. Inspecting your hot water heater routinely for signs of corrosion is important because it can cause holes in your tank, resulting in a leak.

Also, if the tank is over 10 years old, it may be time to consider replacing your water heater. A professional HVAC technician can help determine whether a replacement is needed or a repair is possible.

4. Drain Valve Issues

The drain valve on your water heater is used during maintenance to drain harmful sediment. Over time, sediment collects in the water in your hot water tank. These deposits can decrease the efficiency of your water heater and shorten its lifespan by causing corrosion. A professional should drain your hot water system once a year to ensure proper operation.

The drain valve is usually at the bottom of your hot water tank and can eventually develop leaks. These leaks are often caused by a worn-out gasket or plastic parts in the valve cracking due to constantly warming up and cooling down. You will have to contact a professional to replace your drain valve.

5. Water Supply Line Issues

Water supply lines can also be a potential source of leaking around your water heater. Over time, the connections between these pipes and the water heater can become loose or corroded, leading to leaking at the top of your water heater. A professional can check these connections, tighten them, and replace any parts if necessary.

6. Water Temperature Settings

Finally, the temperature settings of your water heater can also lead to leaking if they are set too high. An overly high-temperature setting puts more pressure on the system than necessary, which will cause leaks over time.

In most cases, keeping your water heater at a lower temperature will reduce wear and tear on the system. Experts recommend keeping it at 120 to 125 degrees Fahrenheit. In addition, keeping your system in this range may save you money on utility bills. If you’re unsure what temperature setting is ideal for your household, consult a professional for advice.

Our Services

At Guaranteed Comfort Heating & Cooling, we have been serving the residents of Windsor, ON for over 35 years. We install, maintain, and repair heating, cooling, and hot water systems. In addition, we provide indoor air quality services and preventative maintenance plans. Contact Guaranteed Comfort Heating & Cooling today if you have water heater problems or any other HVAC issues.

Chris Egan


Chris Egan, owner of Guaranteed Comfort Heating & Cooling, brings over 35 years of HVAC experience. Dedicated to customer satisfaction, he delivers top-notch heating and cooling solutions.