Why Does Your Instant Water Heater Keep Tripping the Circuit Breaker?

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Many individuals opt for instant water heater installation in Singapore because it is a convenient and efficient way to provide hot water in your home. However, if you find that your instant water heater keeps tripping the circuit breaker, it can be frustrating and inconvenient. 

There are several possible reasons why this could be happening, ranging from simple issues that you can easily fix yourself to more complex problems that require professional assistance. In this article, we will explore some of the most common causes of a tripping circuit breaker in an instant water heater and discuss possible solutions.


Burnt Heating Element


One of the most common reasons for a tripping circuit breaker in a storage water heater or instant water heater is a burnt heating element. Much like storage water heaters, the heating element of instant water heaters is responsible for heating the water, and if it becomes damaged or worn out, it can cause the circuit breaker to trip. This can happen for various reasons, such as mineral deposits building up on the element or excessive voltage fluctuations. 

Suppose you suspect that a burnt heating element is the cause of your circuit breaker tripping. In that case, it is best to contact a professional water heater services to inspect and replace the element if necessary.


Faulty Thermostat


A malfunctioning thermostat could also be a potential issue encountered with storage water heaters or instant water heaters, possibly leading to a tripped circuit breaker. The thermostat is responsible for regulating the temperature of the water and ensuring that it does not exceed a certain limit. If the thermostat malfunctions and allows the water to get too hot, it can cause the circuit breaker to trip as a safety measure. 

In some cases, a faulty thermostat may need to be recalibrated or replaced to resolve the issue. It is advisable to seek the assistance of a professional to properly diagnose and rectify this problem.


Bad Breaker Or Wiring

Sometimes, the problem lies with the circuit breaker itself or the wiring connected to your instant water heater. A faulty breaker or loose wiring can cause the circuit breaker to trip when the water heater is in use. This can happen due to wear and tear, substandard electrical components, or improper installation. If you suspect that the circuit breaker or wiring is the cause of the problem, it is crucial to consult a professional to assess and address the issue. They will be able to advise where you should replace or repair your water heater. Additionally, they will be able to replace the faulty breaker or repair any loose connections, ensuring the safe and proper functioning of your instant water heater.


Water Heater Leak

A leaking water heater can lead to a tripping circuit breaker as well. If there is a leak in your instant water heater, water can come into contact with electrical components, causing a short circuit and triggering the circuit breaker. This is a serious issue that requires immediate attention to prevent further damage and potential safety hazards. It is essential to shut off the power supply to the water heater and contact a professional plumber to inspect and repair the leak. They will be able to identify the cause of the instant water heater leak and take the necessary steps to fix it, ensuring the safe operation of your instant water heater.


Overloading the Circuit


Another common reason for a tripping circuit breaker in an instant water heater is overloading the circuit. If there are multiple high-power appliances connected to the same circuit as the water heater, it can cause the circuit to become overloaded and trip the breaker. Therefore, one tip to prevent your water heater from tripping the circuit breaker is to avoid this issue proactively. It is recommended to distribute the load evenly across different circuits or consider having a dedicated circuit for your instant water heater to prevent overloading and ensure uninterrupted performance.


Ground Faults

Ground faults can also cause a circuit breaker to trip in an instant water heater. A ground fault occurs when an electrical current takes an unintended path to the ground, bypassing the intended circuit. This can happen due to damaged wiring, faulty grounding, or a malfunctioning electrical component. If you suspect a ground fault is the cause of your tripping circuit breaker, it is crucial to seek professional assistance. They will be able to identify and rectify any ground faults, ensuring the safe and proper functioning of your installed instant water heater.


Corrosion or Loose Connections

Corrosion or loose connections – one factor that affects instant water heater lifespan – can also contribute to a circuit breaker tripping in an instant water heater. Over time, the electrical connections within the water heater can become corroded or loose, leading to increased resistance and heat generation. This can cause the circuit breaker to trip as a protective measure. However, understanding the reasons why the water heater is corroding and loosening connections is crucial in preventing the escalation of such instances. 

If you suspect corrosion or loose connections as the cause of your problem, it is important to have a professional inspect and clean the connections. They will also be able to tighten any loose connections, ensuring proper electrical flow and minimizing the risk of a tripping circuit breaker.


Contact Water Heater City Singapore for Professional Instant Water Heater Services

If you have tried troubleshooting the issue with your instant water heater but are still experiencing problems, it is advisable to seek the assistance of professionals. Water Heater City Singapore is a trusted provider of water heater services in Singapore. Our team of experienced technicians can diagnose and resolve a wide range of issues with instant water heaters. Whether it’s a faulty heating element, a malfunctioning thermostat, or any other problem, we will provide expert solutions to ensure the optimal performance of your instant water heater. Contact Water Heater City Singapore today!



The instant supply of hot water is one of the reasons why you should opt for instant water heater installation. However, a tripping circuit breaker in your water heater can be a frustrating problem that disrupts your daily routine. By understanding the possible causes behind this issue and taking appropriate measures, you can restore the proper functioning of your water heater and enjoy hot water without any interruptions. Whether it’s a burnt heating element, a faulty thermostat, bad wiring, a water heater leak, or other issues, it is important to address them promptly and seek professional assistance when needed. Remember, the safety and efficiency of your instant water heater are paramount, and taking the right steps will help you avoid further complications. 

If you’re facing a tripping circuit breaker with your instant water heater, you can explore more about Water Heater City Singapore for our wide variety of water heater services or read through our articles to gain valuable insight about water heaters.


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!