It would be bad if you had on and off for a long period of time?
It's not a bad idea to turn off the water heater especially if it is electric. It will consume power the whole time you are gone to keep the water hot and wastes a lot of electricity.
YES and No Yes if you are going to be working on the gas water heater and No if you are working on a cold water line and if you are working on a hot water line you can shut off the gas or electric to the water heater so in case your water heater drains but what I usually do is just turn the water heater's water supply valve off.
Same as any hot water heater. Turn the gas valve to off.
Not if the water heater is electric
No, and this is a very good energy saving practice.
Turn off to replace or service. Turn off if away from home for extended amount of time, such as vacation.
turn off your water
Maybe a bad switch
This is a result of dust and other debris that has accumulated on the coils or in the heater. When you turn it on, it begins to burn off and that is what you smell.
Yes, make sure you turn off power to the water heater. Also shut off the icemaker. No. Just turn it off. Just remember to turn it back on before you open any of your inside faucets. And you also need to turn off the hot water heater.
no you dont It is safe to leave the water on, whislt changing the stem If you don't want any problems, turn the pressure off.
Turn it off at the fuise box, whyheat water when your not there