6 Factors That Cause My 707 Water Heater Not To Heat

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It is great to have a water heater that can reliably and continuously supply hot water. However, the performance of your water heater will drop significantly if you fail to properly maintain it. In severe cases, you will need to replace your water heater.

The first step to take when your water heater is not producing hot water is to check if it is powered on. It could be a power failure from loose wiring, or a tripped circuit breaker. In the latter scenario, you may want to learn about the 3 tips to prevent your water heater from tripping the circuit breaker.

However, there are some other factors that may cause your 707 water heater to not heat.

Water Not Hot Enough

Your 707 Instant Water Heater typically has a maximum temperature of about 40 to 50 degrees Celsius as a safety mechanism. If this doesn’t produce sufficiently hot water for you, perhaps you should consider replacing your water heater with a storage water heater, since they have a higher temperature cap. A storage heater model you can consider is the 707 Kensington 25 Storage Water Heater.

Not Enough Hot Water

If you are using a 707 storage water heater, the lack of hot water could be due to the tank capacity being too small to satisfy the needs of the entire family. In that case, you have to upsize your water heater into a model like the 707 Kensington 35 Storage Water Heater.

Cracked Dip Tube

One thing that you should know about storage water heaters is that the cold water is supplied through a dip tube. If this dip tube is damaged, the cold water will mix with the hot water in the tank. This will necessitate a water heater replacement.

Defective Thermostat

One of the most common water heater problems is the inability to heat water properly. A major cause of this is a faulty thermostat. If changing the thermostat settings on your 707 water heater doesn’t restore the supply of hot water, you will need to contact a professional water heater technician for help. He will analyze your situation and recommend if you need to replace or repair your water heater.



One of the factors that can affect your water heater’s lifespan is wear and tear. The degradation and corrosion of water heater components can wear out the heating element or cause sediment build up that can aggravate the situation. This is why it is important to proactively learn about the reasons why your water heater is corroding so that you can take pre-emptive measures.

Not only should you hire a professional to install your storage water heaters, you should also make sure to regularly maintain your appliance. An experienced technician can help flush your 707 water heater system to remove any sedimentary build-up. If necessary, he can even manually scrape out excess blockage from within your water heater to restore its functionality.

Faulty Pressure Relief

One of the signs of a faulty water heater is low water pressure. This can be caused by a faulty temperature and pressure (TP) valve. The TP valve opens and releases water out of the tank when the temperature and/or pressure reaches an unsafe level, until they return to normal. If your 707 water heater has a faulty TP valve, it may result in the premature venting of water, causing the water heater to be unable to heat up the water properly.


There are 6 factors that can cause your 707 water heater to not heat water properly. This could be due to a hardwired temperature cap or capacity limit, damaged components like a cracked dip tube, defective thermostat, and faulty pressure relief valve, or even corrosion. It is advisable to seek professional advice to determine the root cause of the issue, so that you can rectify it accordingly. If you need to replace your water heater, you can even consult our storage water heater buying guide.

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!