Increase the thermostat temperature setting on your water heater during the winter months. Some families find, for example, that college students returning home for summer suddenly cause a hot water shortage. Hot Water Not Hot Enough? This is one of the most common water heater issues that is hardly exposed. Prevention—in the form of yearly flushing of the water heater tank to remove any buildup of sediment and rust that collects in the bottom of the tank. Because your water outlet is also located at the top of your tank, that cold water will flow straight from your dip tube through the outlet, leaving you with cold water. Perhaps the most common reason for an inadequate supply of hot water is that there are too many fixtures and appliances drawing hot water for the water heater to keep up with the demand. Not Enough Hot Water. If this doesn’t work, you either have a faulty thermostat or a buildup of sediment in your tank. The small tank water heater provides you with hot water while your tankless unit’s heat exchanger warms up. To do this test, the water must be hot enough for the upper thermostat to direct power to the lower one, meaning your water heater must have power for long enough to heat the water. Ignition Failure. If rust, corrosion, and sediment build-up in the bottom of a water heater tank, the burner or heating elements will not heat the water as efficiently, making it harder to maintain a good supply of sufficiently hot water. As we already mentioned, avoid setting the temperature any higher than 125 degrees, since doing so will put you at risk of burn injuries. Often the water that enters your tank carries some … Sediment Buildup In The Tank. Test and replace a faulty element. Set the thermostat higher—at 140 F or higher. If your water heater is at least 10 years old, efforts to correct a diminishing supply of hot water may be futile. Of course, if you don’t have much experience with either plumbing or electrical work, your best bet is to hire a licensed plumber to maintain your water heater for you. Either of these things could lead you to consume more hot water than usual, which would be the reason you don’t have enough water. The dip tube is the part of your water heating system where cold water enters the heating tank. Upgrading to a larger water heater or a tankless model may be in your future. No gas, no hot water. A gas water heater can last anywhere from 6 to 10 years. You should examine your sacrificial anode rod at least once every three years. No hot water is one of the most common problems in water heating systems. This valve needs to be replaced if the thermostat is defective. The first residential hot water heater was made in England in 1868. Gas Water Heaters. If your water heater is old—10 years or older—it’s possible that you have a broken heating element, thermostat, or gas valve. The Spruce uses cookies to provide you with a great user experience. While having your gas water heater not hot enough is certainly a common issue, there are many other common water heater problems. Gas water heater produces only warm water when thermostat is defective. With proper maintenance, you may be able to keep your water heater in service for up to 15 years. A gas-powered water heater consists of a cold-water input line, a gas vent and a hot water supply line. If your hot water isn’t hot enough, or you are running out of hot water too quickly, it may pay to adjust the temperature of your hot water thermostat. Shut off the electricity and water supply to the water heater and then drain the tank to flush out tank sediment. Gas water heaters can be tricky because they don’t just have plumbing components—they have electrical components as well. Is your gas water heater not hot enough? If the usage has exceeded the capacity of the water heater, wait for the water heater to fully recover. Testing whether or not a thermocouple is broken requires special equipment, so when dealing with this problem it’s often easiest to call in a reputable, licensed plumber. Thankfully, there are ways to keep your water heater in tip-top condition which can even potentially extend the life of your water heater. In the interest of energy savings and home safety, many people set the thermostat on the water heater at a fairly modest 120 F. This is good practice, but it also means that you may be running a shower or sink faucet at the full hot position in order to get the hot water you need. Gas Water Heater Not Heating? Leaking tanks can lead to water damage, short circuits or even a fire. This buildup of debris can make it more difficult for your water to heat up, causing lukewarm or cold water to flow through your pipes. 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