ECO Energy Service's

Why Does My Hot Water Keep Going Cold?


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Are you frustrated because your hot water keeps going cold? Have you ever wondered why your shower goes hot and cold unexpectedly, making your bathing experience less than pleasant? It’s a common problem that many people face, leaving them puzzled and seeking answers.

Let’s dive into the reasons behind these issues. From faulty heating elements to sediment buildup in your water tank, several factors can contribute to your hot water troubles. So, when your hot water keeps going cold, and your shower fluctuates between hot and cold temperatures, you need to find out the root cause.

Faults in the Heating System

So if the questions ‘Why does my shower go hot and cold’ or ‘Why does my hot water keep going cold’ occur in your mind over and over again, you should look at your heating system. Firstly, a common problem is a faulty heating element. Over time, it gets old and burns out. Consequently, this makes your water not hot anymore. Electric heaters usually have two elements: one for pipes and one for the tank. Moreover, hard water buildup can also cause problems.

So, if your shower’s cold, first of all check the heating element. If it’s burned out, you might need to replace it. Then, you can have hot showers again in no time.

How to fix Boiler Faults?

Firstly, make sure to check the tank for sediment buildup. Secondly, use a continuity tester or multimeter to test the voltage on the heating elements. If they’re not working, you’ll need to replace them. Lastly, ensure that the size of the heating element matches the size of your water tank and your household’s hot water needs.


Broken water heater dip tube

If the dip tube breaks, cold water mixes with hot water in the tank. This is because the dip tube brings cold water to the bottom of the tank. After that, the mixed water comes out of the outlets. So this is the main reason why your hot water keeps going cold. Moreover, you’ll notice this problem if you find bits of plastic from the broken tube in your appliances or showerhead. Additionally, your hot water keeps going cold fast, even after a short shower.

To fix a broken dip tube, you need to replace it. Because the tube is located at the bottom and runs along the tank, so it’s a good idea to call a plumber for help.

Overuse of hot water

When lots of people shower in a row, hot water can run out. This happens more if other appliances like the washing machine are also using hot water. As a result, your hot water keeps going cold, even when you’re still in it.

To avoid this, use hot water at different times, not all together. This gives the water heater time to heat more water. Also, run appliances when nobody’s using hot water for a shower. As a result, this helps share the hot water load. To solve this, you can do two things. Get a bigger tank or add extra ones. Moreover, a plumber can help connect these tanks to give you more hot water.

Issues with the thermostat

Thermostats control when the water heater turns on and how hot the water gets. Both heating elements have one. Moreover, these gadgets talk to each other. If the top one senses cold water, it tells the bottom one to adjust. But if this doesn’t work, you might not have hot water. To tackle it, replace the broken thermostat system. Plus, ask an expert for help to get the right one.

Problems with pipes

Next, good pipes are important for heating water. So, if pipes are bad, water won’t flow well, and your hot water keeps going cold. Moreover, pipes close together can also make hot water cool down faster. Hot and cold pipes next to each other can transfer heat. This happens more with copper pipes because they’re good at moving heat.

To deal with it, ask a plumber to check your pipes and heating system. They might need to replace bad fittings or old pipes. If your copper pipes are causing problems, they might suggest using different materials. Moreover, if pipes are too close, they might suggest insulating them with sleeves made of different materials.

Odd and older heating system

Appliances like water heaters don’t last forever. Usually, they work for 8 to 12 years. But hard water, using it a lot, or installing the tank wrong can make it wear out faster. So to fix it, talk to a certified plumber. They’ll check if your water heater is too old to work well. If it is, you might need to get a new one.

Inconsistent power supply

Because the water heater needs electricity to work, if the power isn’t steady, you might not have hot water. This can even happen with solar power. So if your power goes up and down, you’ll need another way to keep your heater working. Now, you can use a stabilizer or a generator that turns on if the main power goes out.

Bottom line

In conclusion, understanding the causes of hot water issues is key. By addressing problems promptly, you can restore consistent hot water flow. Whether it’s replacing parts or upgrading your water heater, solutions are available. So, don’t let hot water troubles ruin your day. Take action and enjoy uninterrupted warmth and comfort.


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