Signs of Faulty Water Heater

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Water heaters have made warm showers more convenient for everyone. The three different types of heaters are instant water heater, storage water heater, and a multipoint water heater.

Water heaters are essential for everyday use, which is why you need to have knowledge on how to spot any water heater leaks to help you with the repair process. If the damages cannot be repaired, a reliable plumber may also advise a water heater replacement. We have listed down some water heater failure signs:


Water Turns Rusty


If you have noticed rust in the water that is coming out from your shower heads, it may be because rust is forming inside your water heaters. It can also be because your pipes have turned rusty. When this occurs, the ideal thing to do is to contact a professional plumber to engage in water heater services.


Water Heater Surface Becomes Wet


It is very common for most water heaters’ surfaces to become wet. However, when this occurs, it may be because of a minor leak in the water heater storage or tank. The metal of the tank expands whenever the temperature is high which results in the leak. However, the leak may stop when it cools down. This is why you need to always observe the leak carefully. Ideally, you should not hesitate to contact a reliable plumber to attend to your water heater maintenance needs or for your water heater replacement.


Water Heaters Produces Noise


Residue and dirt build-up may occur at the bottom of the water heater tanks. When it hardens, it can cause a loud noise every time your heater is in use. This would also mean that your water heater is no longer performing optimally and would require a replacement.

If you are looking into durable water heaters to install, you may consider water heaters by Ariston, Rheem and Joven.


Burn Marks at the Bottom of the Tank


Improper venting and damaged pipes may cause burnt marks at the bottom of your water heater tanks. If this happens, it is not recommended to just repair it because it cannot be undone. The most ideal thing to do is to get a higher quality water heater replacement done immediately because repairing it will not work and may even lead to electric shocks during showers.


Hot Water Shortage


Do you not have enough hot water for even a single shower a day or even do your dishes? Does your heater take too long to heat the water? If you are encountering these water heater issues, then there may be electrical or sediment buildup around the heating element. Usually, this is a warning sign that is suggesting a water heater replacement. 

If your water heater gets flushed yearly, then you will not likely face this water heater problem, not too soon at least. Since the lifespan of your water heater will greatly be increased.


Inconsistent Temperature


There are times wherein the instant or storage water heater gets too hot, and the next thing you notice it is too cold, and at times it is just normal. If you encounter temperature changes very often, then this determines a bigger issue that can only get worse sooner or later. 

Try setting your water heater thermostat to your desired temperature. If the water is too hot, you can lower the temperature. Regardless of whether the water is still too hot or cold, you might have to replace your water heater’s thermostat. 

It is not advisable to do this by yourself. Instead, hire a professional water heater installer like Water Heater City Singapore. Our experts have years of experience, and they will be able to tell you if your thermostat is causing the issue in no time. If it is, we will replace that for you. We can also fix other problems that are causing your temperature to change.


Reduced Water Flow

Changes in water flow rate or pressure are due to sediment or scale buildup in the water heater itself or within the plumbing which connects your water heater installation to the locations inside your house. This sign should not be ignored since the buildup will get worse, and you will not have access to hot water. 

Instead of trying to drain your tank and flush out the sediment on your own, it will be best to let a professional like Water Heater City Singapore handle the task. Our experts will drain your tank and remove the sediment buildup. They will also look through possible issues that can cause your water heater to be faulty in the future.




You may have invested in a good quality water heater, then you can expect it to last you for around 10 years or so. If you use a water softener and have chosen for regular water heater maintenance, then your water heater will last for a long time.

If, however, your unit is more than 10 years old, and also has started showing many problems. A wise choice would be to buy a new water heater before it breaks down. 


Dirty Water

Another sign of a faulty water heater is when the water that comes out of the faucet is dirty. Metallic odor or rust deposits coming along with hot water is a sign of rust inside your water heater or it can be due to rusty pipes.

Dirty water coming out from the tap is also a sign of water heater failure. The cloudy water is a result of mineral deposits in your system. As they keep building up, they will block the water flow, and damage the parts of your installed water heater.

You can hire a water heater professional to let them look through your water heater. If things are beyond repair, and your heater is way too old, then you have no choice but to immediately have a water heater replacement



You should never ignore the signs of a faulty water heater as it may be possible that your water heater can have a total breakdown. Addressing the water heater issues right away can help you prevent paying costly repairs. The signs are obvious to notice, and once you spot them do not hesitate to call a water heater service like Water Heater City Singapore. Our plumbing experts will look through the problem and solve them in no time. We will ensure that your water heater will be optimized.

Do not hesitate to call Water Heater City Singapore to attend to all your water heater needs! We have experienced professionals that will help you throughout the process of your water heater repairs, installations, or replacement!


Water Heater City Singapore is your trusted partner for comprehensive water heater services. With over a decade of experience, we pride ourselves on being a reliable water heater company. Our services such as water heater installation/replacement including instant water heater services installation and storage water heater installations are done efficiently by our expert team. Moreover, we will ensure your storage water heaters are Licensed Installation with PUB Submission and all works comply with standards prescribed/stipulated by PUB. If required, we are also able to open a false ceiling, patch it back up, and paint it to restore it to its original condition. 

We supply a wide selection of water heaters from top brands like Ariston, Rheem, Joven, 707, Rubine, and Champs. With a proven track record of successful past projects and a number of positive customer reviews on Google and Facebook, we ensure every service we provide will be done efficiently and with the utmost attention to detail. Contact us on WhatsApp at +65 8241 0032 for transparent quotations and honest pricing for all your water heater needs!