Sunrise Specialty » 9 Common Reasons Why No Hot Water (Tips to Fix)

9 Common Reasons Why No Hot Water (Tips to Fix)

Is your water heater not making water hot as usual? Or does the hot water heater takes too long to heat the water? Many find this very frustrating when the unit stops giving hot water. Luckily, you can solve this problem when it occurs.

However, it is advisable to know the cause of this problem so that you can fix it. Hence, we will reveal to you the reason why not hot water supply, and how you can get it fixed.

General Tips When No Hot Water on Electric and Gas Water Heaters

One of the easiest ways of solving this problem when No hot water in house is by giving your water heater a couple of hours to reheat the water in it.

Most times, the hot water in a tankless water heater may run out due to excessive use. If this is the case, leave your water heater for a few hours to reheat. However, if you still don’t have hot water after trying this method, then the fault may be from somewhere else.

If you use a water heater that comes with a tank, the problem may be from its size. Smaller water heater tanks do not save up as much water as the bigger units. There is a wide range of hot water tanks out there, and finding the right size is sometimes difficult. If you live with your family, then check to see the size of the hot water tank that is best for you.

Why No Hot Water from Gas Water Heater

1. Water Heater Has No Gas Supply

Water Heater Has No Gas Supply

Most times, the level of gas supply is a major problem. If you find out that there is no hot water and the gas water heater is on, check the state of your gas supply.

You could have turned off the gas supply without even knowing it, or it might be that the switch off button has a defect. When this happens, switch your gas to “pilot” and take out the cover around the pilot light and the burner.

2. No Pilot Light

No Pilot Light

If you no longer see a flame, then it means your pilot light is off. When this happens, all you need to do will be to relight it.

However, you need to know that most of the new heaters no longer come with pilot lights. Instead, they feature glow plugs or spark ignitors. If this is a case of yours, you might need to call trained personnel or try fixing it by reading the owner’s manual.

In case your water heater comes with a pilot light, carefully check if there are instructions printed on it. If you cannot find any, try the simple trick below!

  • Switch off the regulator for 5 minutes or more while waiting for the gas to dissipate. Afterward, switch your regulator to “pilot.”
  • If the water heater has a self-ignite function, you should press and hold the ignition knob for 60 seconds or more. Once you have done this, switch your regulator to the “on” position.
  • If you must use a flame to light the pilot back on, then all you need is a long lighter. Put on the lighter while directing it to your pilot burner at the gas supply tube. Using this method should put your pilot light back on.

However, if the pilot light fails to ignite, check to see if the gas inlet valve is open. If it isn’t, open the gas inlet valve by turning the handle to the same distance as the gas line. After letting the gas in, try to light your pilot again.

If the pilot light still fails to come up, it may mean that the thermocouple is faulty. If you notice this problem, pick up a phone and call the gas utility company as they carry out this service for no charge.

3. When There Is a Gas Leak

When There Is a Gas Leak

The natural state of pure gas is colorless and produces no smells. A gas-related product known as mercaptan is added to gas to help us perceive gas leaks. When this product is added, gas tends to smell like rotten eggs or sulfur when there is a leak.

If you smell gas around your unit, quickly switch off or lock the gas valve. You can turn off the gas valve by giving it a downward push. if the gas valve is broken, you should replace it.

Guides for Electric Water Heater

4. Tripped Breaker

Tripped Breaker

Inspect it to know if there is a button in the electric water heater that might be switched off. Afterward, examine the circuit breaker box to find out if the breaker is tripped.

A breaker that has tripped might not be in the opposite direction from others, but it will be out of line. If it is tripped, all you have to do is turn it off and put it back on. This will do the trick by resetting it.

However, if the breaker goes off again even after you reset it, call a trusted electrician. For water heater to function properly, all its circuit breaker needs to be in good shape. If yours has a faulty circuit breaker, quickly call an electrician.

5. Faulty High-Temperature Cutoff Switch

Faulty High-Temperature Cutoff Switch

A tripped high-temperature cutoff switch is one of the major reasons why no hot water comes into your home anymore. You can fix it by opening the switch and pushing a button.

When you push it, you will hear a clicking sound, and then power will get back to the water heater. If the power doesn’t get restored, it probably means the high-temperature cutoff is faulty and needs a replacement.

6. A Flooded Compartment

A Flooded Compartment

If the compartment is flooded, then it means that water has found its way into it. Water may cause malfunctions if it gets to the thermostat.

7. Faulty Heating Elements

Faulty Heating Elements

Sometimes, the heating elements may be one of the reasons why no hot water runs in your home. Water heaters only last for 10 years, and buying a new one is better than fixing an outdated one. Nonetheless, if you must replace your heating elements, ensure that you completely turn off your water heater.

8. Look For Possible Water Leaks

Look For Possible Water Leaks

Sometimes, water leaks may be the main reason why no hot water supply problems happen in the first place. Look out for water leaks whenever you have a problem with your hot water.

9. Defective Thermostat

Defective Thermostat

The upper thermostat controls the lower and upper heating elements of an electric water heater. A spoilt thermostat will cause a hot water problem. Your hot water will not get hot enough if the lower thermostat is faulty. Fixing your thermostat will help solve your hot water problems.

Water Heater Can’t Keep Up to Your Home Needs

Water Heater Can not Keep Up to Your Home Needs

If your water heater has no fault but can’t meet your household hot water needs, you need to know how to avoid such a problem. Learning and managing the situation is sometimes the best thing, although you can buy a larger water heater if necessary. Below are two great tips to help you keep the hot water running when the water heater can’t keep up.

a). Limit Your Usage

An average shower dispenses 40 liters of water every 60 seconds. If the capacity of your water heater tank is 50 gallons, you can run out of hot water at any time.

A water heater tank with a 70-gallon capacity won’t deliver more than 43 gallons of hot water. The reason is that the hot water gets diluted when the cold water gets into the tank. With this in mind, you can only use part of your hot water and not all of it.

b). Know the Recovery Time

When your water heater gets drained, it’ll need some recovery time to dispense hot water as it once did. It usually takes minutes or hours to recover (depending on your tank size). For instance, a 70-gallon tank will take about 26 minutes to refill and heat the water.

To have hot water in the fastest way possible, avoid using hot water when the recovery process is not done. Allowing the recovering time to complete will make the unit heat the water quicker.

Drawing water when the recovery process is still going on will add cool water to the tank. When this happens, the recovery time increases, and the water will not be well heated.

c). Loose Connections

Electric water will stop functioning properly if the wiring of the unit becomes loose. Hence, turn off the unit and check if the entire wiring is still in place. This problem is rare to encounter, but you should also consider it.

d). Broken Tank

A broken tank can cause water not to reach the required heater temperature. A leaking tank can result in a fire outbreak, short circuits, or even cause water damages. If it is broken, it will be best you replace the water heater.

Wrap Up

A water heater can stop dispensing hot water for many different reasons. However, stay alert and always find a way to fix a hot water problem whenever one occurs. With this post, you should know how to detect the problem and fix it before it becomes too serious.

Do you have any questions or comments? If you do, you can leave your comment or question with us!

14 thoughts on “9 Common Reasons Why No Hot Water (Tips to Fix)”

  1. I can my hot water to get hot water what the problem?

    • The water is not getting hot.

      • Mybrand new water heater is not giving me no hot water iny faucets the pipe is hot in the cold line n the hot line is cold why

  2. My hot water will run fine then it will just fine then all of a sudden after using it for weeks it will stop running . Someone said air was in the line but I need answers please


  4. My hot water heater must keeps water running into it wont shut off and doesn’t heat

  5. My moms basement flooded and I came to light the hot water heater, telling her I know what I am doing. I tried every ten minutes without success. Last year when her basement flooded she had to buy a new one. This one! Is there anyway you fix it???? She is a widow and I don’t want her taken advantage of if it’s fixable.

  6. I have a well there is no hot water coming in my house what’s the problem

  7. I have hot water in one part of the house but not hot on other far end ?

  8. My brand new water heater is not giving me no hot water in any faucets inside the house the hot pipe is cold in the cold pipe is hot why

  9. Did you find the problem? I am having the same issue. We are on a well and after a power outage Sunday we weren’t getting any hot water even though the tank is filled with hot water. Landlord replaced the tank and again, hot water in the tank but only releasing cold water in the faucets. Any idea? Thanks!!

  10. Thank you so much for this informative article!
    My hot water went out and I followed the instructions in this article to try clicking the reset button on the water heater and my hot water was restored!

    Thank You!

  11. Our hot water heater stopped working. I was interested in your thought that the level of gas supply could be the cause of this problem. I know the gas is on, but I am unsure how to check the state of the gas supply. It seems a little complicated, at least enough to want to get in touch with a professional. I will probably call an installer today.

  12. Yesterday, we lost our hot water. We do have the type of water heater that has a spark ignitor rather than a pilot light. Since we can’t simply light the pilot, we will take your suggestion and call a professional plumbing service. Hopefully, we can get it going by tomorrow.


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