Tankless Water Heater Water Goes Cold

First off this is a common tankless problem called a cold water sandwich.

Tankless water heater water goes cold.

Why the tankless water heater s size matters. Rinnai heater puts out water which fluctuates temperatures from very hot to very cold but will not hold a moderate temperature throughout shower. Either take the shower head off and soak it in vinegar water for 1 2 hour to clean it or tap out the water restrictor screen in the center of it and see if that solves the problem. If you live in a cold climate like massachusetts and are looking for a tankless water heater go gas.

Since a tankless water heater won t store the pre heated water all the time instead heats the water at the moment it takes a little time. My tank less water heater goes. A water flow servo on the unit them meters the appropriate cold water after it leaves the burner area to arrive at the set point temp plus or minus 2 f. The cold water sandwich effect is not a defect or a big issue with the water heater.

When you turn out other faucets at the same time that increases water flow out of the water heater and keeps the heater turned on. This problem happens because the heat exchanger the part that actually heats the water takes a while to warm up. Volume of cold water go down the drain. So by knowing this we can avoid going to bath immediately after one person finishes his turn.

One of the likely possibilities for a cold tankless heater is the cold external temperatures. This can be caused by. Before it fully warms up and starts heating the water you get a short run of cold water. Another problem that tankless water heaters can run into is that of a cold water sandwich a plumbing term given to sudden temperature fluctuations when your tankless water heater produces hot and cold water intermittently.

If theâ tankless water heater is shutting off when someone opens or closes some cold. To fix this do not touch anything and let the intruding. This might seem painfully obvious especially if you live in a colder climate but you d be surprised to know how many people don t even consider the fact that the outside temperature is affecting the water temperature in their tankless heater. An improperly sized gas line as mentioned above.

Water fixture the problem could be with the temperature regulating valves you. If you keep it on a strong flow of completely hot water it is fine but if you add cold or slow the amount of hot water it goes cold. A tankless is a direct fired appliance and the water is actually heated to a much higher temp than the touch pad control indicates. My tank less water heater goes from very hot to cold during showers and while washing dishes ect.