So it is very important to keep checking your water heater before any damage may occur.
Water heater cold inlet is warm.
Gradually the water that stores cold water will become warm due to the mixture of the temperature.
See water heater leaking from the top for more information.
To avoid this matter either you can change your faulty thermostat or bring a newer water heater at home.
It would be normal for the cold water inlet line to be warm to the touch.
Thermostat isn t working properly.
This can lower the efficiency of the unit depending on how long the tank sits idle there are simple devices to eliminate the problem called heat traps.
Water leaking from the bottom.
This is called thermal siphoning.
Since one heater is not enough to warm up all of the water in the cylinder the resulting water flowing from your hot water tap will be lukewarm.
A faulty or loose temperature and pressure relief valve or inlet valve may also be the cause of leak.
Inlet pipe should always be cool as pressure is feeding the tank.
If your cold water pipe is in contact or close to the ductwork then some of that heat could transfer to the water line.
Finally another issue that homeowners often find with their tankless systems if not properly installed and maintained is mineral buildup.
This is one of the most common water heater issues that is hardly exposed.
Especially when the cold water inlet is spotted leaking no hot water faucets will work properly.
Cold inlet is always on bottom hot out through the top.
Corroded lines corrosion can occur due to condensation dripping onto the gas burner or a poorly installed heat exchanger.
In case one of the immersion heaters malfunctions the other one will still try to overcome that loss and heat the water.
Same as with an electric water heater you should first check the cold water inlet and hot water outlet pipes and connections to make sure they are not loose.
Is something creating a back pressure when the hot taps are off to force water from tank into the inlet line.
A dirty water filter on the cold water inlet.
Also copper piping is a good conductor of heat.
If you have a water expansion tank the thermostat inside the immersion heater can malfunction or even break.
This could cause water to be overheated and flow into the cold water.
The small tank water heater provides you with hot water while your tankless unit s heat exchanger warms up.
If your water heater is not functioning properly you might have landed yourself in big trouble.
Plumbing an inverted u in the water heater s inlet and outlet pipes can help keep hot water from migrating.