Which is required will depend on what can provide a sufficient level of fuel to the water heater.
Tankless water heater problems part 1.
In addition look for these telltale signs of water heater failure.
Banging or rumbling noises.
Mineral buildup system overload cold water sandwich air supply or exhaust blockage ignition failure flame failure.
Most tankless water heaters operate off a 1 2 inch or 3 4 inch gas line.
When using a tankless water heater you re likely to face these issues.
If water has a metallic smell or taste there could be iron present.
He pilot light can go out or fail to ignite and the sensors can simply quit working without any explanation.
With so many wires and small parts tankless hot water heaters can have a long list of possible problems.
If this is the case adjust the maximum temperature between 125 and 130 degrees fahrenheit.
If you see chunks of sediment or water appears cloudy or rusty.
Undersized gas lines can place stress on the water heater reduce its expected lifespan and even be a warranty violation for some manufacturers.
The air supply and specialized exhausts have a tendency to get blocked which usually makes the device shut down.
Changes in water quality.
If your tankless water heater is delivering water that s too hot or too cold there s a number of issues that could cause this problem.
No hot water often related to the flame failure and no ignition water is too hot.
But no system is flawless and demand type heaters are no exception.
Before it fully warms up and starts heating the water you get a short run of cold water.
Water is too cold it could simply be that the water temperature is set too low.
This post will dip into some of the most frequent tankless water heater problems and teach you how to deal with them.
Here are six of the most common problems and maintenance concerns for tankless water heaters.