6 Factors That Cause My 707 Water Heater Not To Heat

Looking For Ariston Water Heaters? WhatsApp Us For Help! WhatsApp to Start Now!

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
 offers complete water heater services for both storage and instant water heater tanks including water heater installation and replacement, and water heater leak. We can provide the supply and installation or replacement of Singapore’s most popular water heater brands like Ariston water heater, Rheem water heater, Joven water heater, 707 water heater, Rubine water heater, and Champs water heater. 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 have over 10 years of experience in the installation of water heaters and have done hundreds of water heater installation cases for landed, condos, and HDB, including complete one-stop installation above false ceilings, plastering and resealing false ceilings. We are a highly recommended Water Heater Services Company in Singapore, with many delighted customers and reviews over the years on Google and Facebook. WhatsApp us at +65 8241 0032 for transparent quotations and honest pricing for all your water heater needs. We also provide fast and efficient service to solve any of your water heater needs!