Causes of Water Heater Failure

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Everyone knows how important a water heater is in a household, and the effects of it as well. The hot water you enjoy in your bathroom, kitchen, and laundry is supplied by the water heater, and that is why having an installed water heater is a great deal for your home comfort. However, just like any other common household appliance, a storage or instant water heater can be faulty due to several reasons. Understanding the main reasons for water heater failure, and how to prevent it can save you a great deal of money.

We have written the seven main causes of water heater failure in Singapore.


Improper Installation


Is your water heater not functioning as it should? Was it installed correctly before you judge that your water heater brand is of low quality? It is vital to know that most private and commercial property owners who reported a faulty water heater in Singapore have not considered whether the entire system had been installed correctly. When something should have been done properly, the priority should be rectifying the wrong water heater installation before accusing anything else. Remember to switch off the power supplying the heater from the circuit breaker before beginning any task.



Another common issue for water heaters is rust. It is even more severe on the water heater that is not protected by sacrificial anodes. To understand better, sacrificial anodes are reactive metal rods that prevent the water heater metal from rusting. Although, these anodes get worn out eventually, and start corroding. Normally, sacrificial anodes last for at least seven years, however, it is advisable to inspect them every year to ensure that they are in good condition. If you notice a slight change in their condition and appearance, it is recommended to replace your water heater before corrosion takes over.


High Water Pressure

Do you know that too much water pressure can badly harm the appliances, water heater, and piping system? The easiest way to recognize this water heater problem is by detecting any leakage from the water heater system. If you notice any overflow, then it is time to adjust the pressure. The highest temperature should not exceed 80 psi. If this issue persists, you should consider installing a water heater relief valve.


Loose Parts


Normally, a water heater system will not function properly if one or more bolts or nuts are loose. To see if there are loose nuts is to check if there is water leaking from the heating element joints. Apart from that, you can re-tighten the nuts and bolts, however, if the problem persists, it is best to consult a professional plumber in Singapore to help prevent significant issues on time.


A Broken Thermostat

If you have checked the heating elements, and see that they will be in good condition, however, you are still not enjoying a hot shower, try to inspect the thermostat. Either the cut-off switch or thermostat could be broken and requires replacement. Even if replacing a broken thermostat is effortless, if you experience difficulties, it is best to hire a professional plumber to do the job.


Wrong Heater Size


Just like any other household appliance, water heaters are available has a wide range of sizes to fit all devices and people’s water usage needs. If your water heater is too small to supply your water heater needs, then that only means that you will be overworking it beyond its capacities. Overworking your water heater could cause your water heater to encounter difficulties or a system breakdown. Engage with a professional plumber to suggest the right size of water heater for your home. 


Old Water Heater

Usually, a water heater should last at least 12 years. Even a well-maintained water heater will start having issues at times. An example would be your installed water heater with severe rust, flickering, pilot light, and abnormal heating level can determine that your heater is outdated. Consider replacing your water heater as it will offer advanced features like an energy-efficient water heater system. This way, you will not only save your money, but you can also enjoy better water heating services.

A water heater that is functioning well means a comfortable shower, laundry, and general hot water application. Therefore, it is important to know the main reasons for a malfunctioning water heater and letting them be fixed by a professional plumber.



Just like any other appliance, a water heater can also suffer from severe damages that may lead to a total breakdown. To constantly enjoy a hot water experience while showering it is important to maintain your water heater in good condition. Failing to solve these water heater issues will certainly require costly repairs or a replacement. To ensure that your water heater’s performance and appearance are best, you may contact our services at Water Heater City. Our plumbing experts know the water heater’s safety and fix any damages your installed water heater has.


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!