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The Typical Problems of Tankless Water Heaters

Tankless water heaters have gained popularity in the Philippines in recent years because of their energy efficiency and convenience. Unlike traditional water heaters, tankless models heat water on demand, meaning you don’t have to wait for a tank to fill up with hot water. While a tankless electric water heater has several advantages, they are not immune to problems.

Here are some typical issues that instant heaters may encounter and solutions to help you handle them effectively.

Flow rate issues are one of the most common problems with tankless water heaters. Tankless models have a limited flow rate, meaning they can only heat a certain amount of water at a time. If you try to use too many fixtures at once, the water may not be heated adequately, resulting in a decrease in water pressure. To prevent flow rate issues, choosing the right tankless water heater size for your home’s needs is essential.

Ignition failure is another common problem with tankless water heaters, especially those that run on gas. The unit may fail to ignite if there is a problem with the gas supply, the ignition system, or the electrical connection. Ignition failure can be dangerous and can result in a gas leak. If you suspect an ignition failure, immediately turn off the gas supply and contact a professional plumber to inspect the unit.

Mineral buildup is another issue that can occur with tankless water heaters. Minerals can accumulate on the heating element, affecting the unit’s performance and efficiency. Mineral buildup can also cause the team to fail prematurely. To prevent mineral buildup, it’s essential to have a water softener installed. A water softener will remove minerals, preventing them from accumulating in the tankless water heater.

The cold-water sandwich effect is a common issue that can occur with tankless water heaters. It happens when you turn on the hot water tap and experience a momentary burst of cold water before the hot water begins to flow. This occurs when hot water remains in the pipes after use and the heater turns off. The best way to avoid this problem is to turn on the hot water tap for a few seconds before using it entirely.

If you are looking for the best electric tankless water heater in the market, then Rheem Philippines is for you. We have constantly developed innovative water heating solutions that can cater to the unique needs of our customers. If you want to browse our extensive range of water heating products, check our website at or contact us by clicking here.