On demand water heater. Does it burn out if the water is turned off?

On demand water heater. Does it burn out if the water is turned off?

Snow in the Eastern Cape
Blankets, scarves and steaming soup were the order of the day for South Africans caught unawares by chilly weather across the country on Thursday morning.
On demand water heater. Does it burn out if the water is turned off?

All electric house. I am considering adding on demand water heaters in two places. They cost at least twice as much as a tank type.

Does an on demand burn the heater elements if the water is turned off? My tank type does burn out the heater elements if the water level drops below the elements in the tank.

Also, is the on demand water heater repairable or would a person have to buy a new one in case of failure?

good question. if your turning off the water, best to turn off the hot water heater also.
all the point of use HW heaters I’ve worked on have a small quantity of water in them (4 oz) which stays 120 deg. as soon as there is a call for water, the cold water coming in triggers the stat to heat up the water.

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