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Why Hot Water Runs Out After 10 Mins

By Aztil –

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A few minutes into your nice, warm, and relaxing shower, you feel the water turning cooler. By the time 10 mins are up, you are completely out of hot water. There goes your dream of letting the hot water soothe your sore and tense muscles. It’s like a splash of cold reality. Sadly, for many of you, it might seem like an everyday occurrence. For others, it might be something you would want to prevent. No matter which category you fall in, you would not wish to run out of hot water when you want it the most.

Have you ever wondered why your hot water runs out after 10 mins while earlier it used to last longer? The truth of the matter is that there are just two plausible causes of it.

1. Increased consumption of hot water.
2. Something is wrong with the water heater.

Increased Consumption Of Hot Water

Hot water is used not just for bathing, but also for washing clothes and dishes. We tend to use it in the bathroom sink for shaving, brushing, washing face, etc. In addition to that, your family size may have increased, thereby increasing the hot water consumption.

What we are trying to say is that there is a high possibility that you have outgrown your current water heater capacity. What you need to do is take stock of how much hot water you are consuming daily and the capacity and efficiency of the water heater to fulfil that demand. If you think that the consumption is more than what the heater tank can hold –

1. You need to upgrade to a water heater with a bigger tank capacity.
2. Refrain from wasting and unnecessarily using hot water.

Something Wrong With The Water Heater

Your water heater is a piece of machinery built of various parts and components. The possibility of it breaking down cannot be discarded. So, what are those things that can go wrong with the water heater such that hot water runs out after 10 mins?

1. Sediment Buildup – Mixed in water are solid particles of minerals, sand, and other debris. Though they are very small in size, over a period of time, they tend to accumulate and form a layer. The thicker the layer, the more space of the tank it occupies and lesser becomes the capacity to hold water. Not only that but sediment buildup also decreases the efficiency of the water heater. It does not heat the water as much as it used to earlier.

The Solution – Make sure that there is a filter in your water heater to catch all impurities. A good water filter will only capture those substances which harm the heater. After that, flush your water heater. In order to flush it, you will first have to empty the tank and thoroughly clean it with fresh water. You can follow the heater manufacturers guide and do the job yourself, or you can call your local plumbing service to do the job for you.

2. Faulty Thermostat – The thermostat mounted on the wall, which controls the temperature of your home isn’t the only thermostat that you need to worry about. Your water heater also has one. Just like your AC thermostat this thermostat too can develop faults.

The Solution – Before doing anything else try resetting the thermostat of your water heater. If that does not work, increase its temperature, for all you know it was the temperature which was set incorrectly. However, if neither of these two tricks works, you might want to call your plumber because your thermostat might need to be replaced.

3. Worn Out Parts – As mentioned at the beginning of this section, your water heater consists of many parts. As it ages, the parts become worn out or get damaged due to constant use. The most common part that gets damaged is the “Dip Tube”. When it gets worn down, it leads to the mixing of cold and hot water. So, you feel as if the hot water runs out after 10 mins.

The Solution – A damaged dip tube has to be replaced. There is no other solution. However, if your water heater is more than 10 years old, it’s probably time to replace it. In an old water heater, sooner or later other parts will also start going bad. So, instead of replacing each damaged part, it’s more economical to buy a new water heater.

4. Heating Element Burned Out – Every water heater has elements which heat up to make the water hot. Constant use can burn these elements. When that happens, water does not heat properly.

The Solution – The only solution to this problem is to ask your plumber to replace the heating elements. Ideally, heating element spoils only in old heaters. If your new heater has this problem, it needs to be checked out.

5. Leaks – Leaks in the tank of the heater as well as the pipeline can also result in less hot water. Usually, leaks would occur due to corrosion or pipes bursting when they freeze. In either case, all the hot water does not reach inside the house for your consumption. Some of it gets wasted as it flows out of the cracks and leaks.

The Solution – You need to find the points of leaks and seal them. If needed, change the damaged part completely. Depending on how comfortable you are handling this job yourself, either you can do it or ask a professional plumber to do it for you.

In The End

Just like your air conditioner , your water heater also requires maintenance. It works day in and day out to provide hot water for you and your family. Taking care of it is essential. If, in spite of regular maintenance , you are facing hot water scarcity, its time to call in the professionals. They are the best judge and will give you apt advice. At your end, see to it that there is no wastage of water. It is a life-saving commodity and should be handled with care.

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Nico Garza was great. Friendly and respectful. We don’t wear shoes in our home and he respected our request
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Tino from Aztill was fantastic explained the work he was doing and answering All my questions thanks Aztill for a wonderful job
Michael did a GREAT job. Thank you, Michael!!
Response from the owner:Hi Angel, thank you for your kind words! We're so glad to hear that Dana did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
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Michael was professional, courteous and very knowledgeable. He’s definitely my go to technician for my HVAC at Aztil.
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The technician, Michael, was exceptional at servicing our AC unit. He didn't rush through and was respectful and super patient with my elderly mother's questions.We would like to request him for future servicing.. It was obvious that he was trained well for this work.
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Mike was early and knocked it out so well especially knowing my schedule. Amazing job and quick turnaround
On /11/10 at 5:30 I had a service visit from Dana, My ac had a leak and eventually shut down. I cant say enough about his great attitude and knowledge. He took his time and fixed every little thing that he could find. His overall attitude was great. People like him will make your business better. A really good technician.
A/C thermostat kept rebooting and indicated the condisation pipe may be clogged. Called an a short time later Antonio, the tech, arrived. He knew exactly what to do and corrected the problem very quickly. He also did the servicing previously. He's efficient, knowledgeable, courteous and very pleasant. An asset to Aztil. No charge with my contract.
Response from the owner:Hi de fink, Thank you for your kind words! We are so glad to hear that Russell was able to diagnose the problem and that our techs were able to install the new system in two days. We strive to provide excellent service and ensure that our customers are satisfied. Thank you again for your review.
Our downstairs A/C stopped working over the weekend. Called Aztil and they sent a technician that same morning! Antonio was excellent — diagnosed and fixed the issue in minutes. Everything was covered under our membership, including the emergency call. Highly recommend!
Michael is fabulous. He diagnosed the problem and fixed it immediately. A very respectful, courteous person you’ll be lucky to have him service your air-conditioning. I would not hesitate to use this company because of him.
Jordan and Jalen were Great and professional they were the best

aztil air conditioning great had other company that was no good aztil is always there for me, and Ramon, was wonderful, very helpful great service
Response from the owner:Hi Harriet, thank you for your kind words! We're so glad to hear that Ramon did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Antonio was a godsend no more sweating and feeling nauseous, my air conditioner is working and if possible, even colder than before! He was so polite and well mannered my mean pitbull loved him and he doesn’t like anyone! Every workplace should have a man like Antonio dealing with the public or maybe he should be a supervisor if not already and teaching any new hires how to behave while being professional and knowing his job well and fast!! thank you very much Aztel and thank you, Antonio!
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Jorge Rivera installed my new A/C system yesterday. He was polite, knowledgeable and worked efficiently. He had David helping him. They made a great team.
Niko was very pleasant and knowledgeable
Antonio was very polite and professional. Very good representative of Aztil
11/6/25 - I had the AeroSeal duct sealing process done today, and Jordan and Skylar were great. Jordan explained the whole process before they started and they answered my (many) questions throughout. It takes about 3-4 hours and the guys covered our furniture in the vent areas, checked for mold/dirt in the ducts, cleaned them all out, then applied the AreoSeal spray. The leakage was reduced significantly when completed - the air flow in the room at the end of the duct run was greatly improved.
Both techs were helpful throughout , right down to cleaning up the minor debris from the vent covers when done. I’d definitely recommend Aztil and Jordan & Skylar for this process.

10/21/25 - Our tech, Elder, provided great service along with good information on how to maintain my HVAC system since we’re not here full time.
He resolved the error I was receiving which shut my system down and explained how to prevent it. Thanks Elder!
Cody & Niko did a great install of my iflo system. They were very professional and cleaned up.
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Nico fixed a drain issue last week, quick, professional service. Cody and Nico did drain and evaporate coil maintenance today as recommended and all went great. Comforting to have them on my team!
Michael was very courteous and professional
Lazaro is an excellent Tech. Courteous and Professional. If possible ask for him for all your HVAC issues. Also just had a total replacement of my AC unit by Angel and Hero . They did an excellent job in and out in 2.5hrs would recommend these install professionals.
Response from the owner:Hi Les, thank you for your kind words! We're so glad to hear that Lazaro did an excellent job and that you were pleased with the outcome. Thank you for being a valued customer.
Jordan and Jalen were fabulous very professional and kind
Dana he is a very good employee from your company!
I am happy with his service
Thank you!!
Antonio was great. Courteous, professional, and took the time to explain things. He also does great work.
Niko. Did a very nice job and answered all my questions. Very satisfied!!
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Michael King was great! Signed up for the anual
We have been a Customer with you since we moved to this House 25 years ago and Always been fixing problems to repair or replace new units! Mr. Melina was, nice, knowledgeable, clean, and found the problem, fixed it and did a Tune-up! In short, they have always been there to help! I thank you all!!
Niko was prompt and courteous. He explained everything that he suggested for my unit clearly. I did not have to pay for this maintenance visit because I have a service contract with them.

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