I have a gas electric water tank and can not get the light on elec so i do not know if the elec is working

For electric tank: Push in the reset button located on upper thermostat.
http://waterheatertimer.org/How-to-troubleshoot-electric-water-heater.html

For gas tank, then more specific information might be needed for example if unit has power vent, when was the air intake cleaned, is the pilot lit, what brand and model number etc etc..
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html

For tankless, or solar, or hybrid electric, gas boiler, or indirect, or RV heater, etc then please include brand, and model that appears on label on side of unit.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

82V52-2 is typical 240Volt 50-gallon electric water heater.
Water heater has to be full of water before turning on power.
This is true for gas and electric water heater.

Once water pipes are connected, you are ready to fill tank.
Turn on cold water shut-off so water enters tank.
Open bathtub spigot on hot side.
When tank is full, water comes out of tub spout full stream.
Let the water run until there is no more air coming out.
Next, open TP lever on water heater for a moment, and this will bleed out last pocket of air.
TP valve is located on upper part of tank, on the side or on top. It is a brass valve with silver-colored lever. Lift lever for a moment and water will exit tank down the overflow tube.
Water heater is full.
Turn on 240Volt circuit breaker going to water heater.

Other links with electric water heater information:
http://waterheatertimer.org/How-to-replace-water-heater-drain-valve.html
http://waterheatertimer.org/Clean-sediment-out-of-water-heater.html#cleanelectric
http://waterheatertimer.org/How-it-works.html

Water heater and brand are not identified:
Question posted under electric water heater, but electric water heaters are not power vent.

First suspect is gas control valve thermostat.
Or burned points on contactor that turns on the blower.
Check if the burner is still going so you are not getting runaway heating that will trip the ECO and require possible gas valve replacement.

Open following link for older Reliance troubleshoot manual, plus some troubleshooting resources and illustrations, plus link to find age of water heater:
http://waterheatertimer.org/How-to-install-gas-water-heater.html#troubleshoot

Add a comment and say what you did to restore functionality.

You posted under electric water heater.

1) Gas or electric, the noise is from sediment build-up inside tank.
Once sediment builds up, the only way to solve problem is to clean the tank out.

2) To restore full efficiency to electric water heater and stop the noise, clean the tank:
http://waterheatertimer.org/How-to-clean-sediment-out-of-electric-water-heater.html
3) To clean gas water heater is more difficult and less successful:
http://waterheatertimer.org/Clean-sediment-out-of-water-heater.html

4) To prevent sediment problem, flush water heater each 6 months before sediment can build up.
http://waterheatertimer.org/Clean-sediment-out-of-water-heater.html#flushelectric

5) Other things to know for water heater maintenance.
http://waterheatertimer.org/Replace-anode-rod.html
http://waterheatertimer.org/9-ways-to-save-with-water-heater.html

Once the hot and cold pipes are connected to water heater, then open bathtub spout on hot side, turn water on so tank begins to fill.
After tub spout is running full stream without air, then water heater is full and it is safe to turn on the heater.

Turning on gas water heater before tank is full can damage tank.
http://waterheatertimer.org/How-to-install-gas-water-heater.html
Turning on electric heater before tank is full will burn out elements. Replace elements.
http://waterheatertimer.org/How-it-works.html

Add a comment for more free help.
Also take advantage of fixya expert assistance live.
For a price, expert works with you while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

Reliance makes gas and electric water heaters.
http://www.reliancewaterheaters.com/

Best way to start is to look at label on side of tank.
Label has serial number, model number, plus it will say if heater is gas or electric.
Reliance water heater age is shown in serial number: first digit is letter, second two digits are numbers: for example numbers 02 would be the year 2002.
If water heater is 8-12 years old, it might be time to consider new tank.

Gas water heater has 3 inch metal flue pipe coming out of top of tank.
Gas pilot is probably off.
Relight pilot light: Most gas water heaters today have instructions on side of tank just above gas valve that say how to relight pilot light. Instructions vary by model.
If you have gas water heater that is older, it might be easier to call a plumber.

Electric water heater has panels on front.
Open top panel and push in red reset button.
If you have electric water heater of any age, you can usually fix it yourself same day:
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

Usually when a tank is making noise, it means the tank needs to be cleaned out or flushed.
I wrote a page with diagrams showing how to clean out a tank, and how to flush the tank.
Page shows gas and electric water heaters.
See if this helps:
http://waterheatertimer.org/Clean-sediment-out-of-water-heater.html

The easiest way to check is to turn on the hot water at a faucet. If you don't get any hot water then you know that the tank is not working. The only switch is the circuit breaker or fuse which send power to your electric tank. J.

THE LIGHTED SWITCH SHOULD BE THE 12V ENERGY SOURCE TO ACTIVATE THE LP SIDE OF THE HEATER. THERE SHOULDN'T BE A LIGHTED SWITCH FOR THE 110 SIDE. THERE SHOULD BE A SWITCH OR A COMBINATION OF SWITCHES. ONE ON THE WALL LIKE A LIGHT SWITCH AND ONE MOUNTED BEHIND THE HEATER.

Yes, unfortunelty elextric water heaters do cycle a lot. They are a little bit different from gas water heaters, in the fact that they run differently and seem to run out of hot water faster, then gas water heaters. Just make sure, that the thermostat is set at 120 F. The thermostat will be behind a panel, and under the electrical wire connections. You will have to use a flathead screw driver, to change the temp. settings, if they need changing. Also, make sure that once a year, that you flip the Pressure relief valve to equalize the pressure and to drain at least 2 gallons of water out of the tank.