Disconnected wire on gas hot water heater/no hot water

best solution is to replace it. you can tru and replace elements, Disconnect the wires that go to heater usually on the top. separate the wires and go turn on the power, if the GFCI trips again, you either have wiring problem or gfci is bad call an electrician to replace the wires or Gfci

Replacing a water heater is no very difficult if you follow the steps.
1. If it is electric turn of the breaker and check to be sure it is the right breaker. If it is gas turn off the valve close to the water heater.
2. Turn off both the hot water and cold water valves
3. Drain all water out of the heater.
4. Disconnect the electric wiring if electric and if gas disconnect the gas line.
5. Disconnect both water lines which may have to be cut depending on how they are connected.
6. Now you can remove the water heater and discard.
7. Place new heater where old one was removed and reconnect both water lines and be sure you have a new pressure valve installed on the water heater.
8. At this point you can turn on water and check for leaks. you should also open a hot water faucet to purge the air out.
9. If no leaks go ahead and hook up the electric or gas lines and if gas is used turn it on and check for leaks using a leak detector or a spray bottle of soapy water and look for bubbles. If no leaks you can go ahead and light the heater according to its instructions.
10. If electric is used turn it on.
11. Take a long hot shower.

Gas or electric?

1) Copy following link for installing new gas water heater, and use steps to move water heater, and then re-install.
http://waterheatertimer.org/How-to-install-gas-water-heater.html#install
http://waterheatertimer.org/Water-heater-will-not-drain.html

2) Don't forget to tape plastic bag over disconnected gas connections to keep from getting dirty.
Dirt in the gas line, or on the threads can cause gas control valve to malfunction.

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

Hi, The thermostat on most hot water heaters is part of the gas control unit.
if you disconnect the wiring on an electric unit or the piping on a gas unit the whole controller should screw out. Make sure that the electrical power is off, gas **** is closed and water tank is empty.
Hope this helps.
Rob

Before calling service technician, open following link for Rheem troubleshooting resources, and contact information:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Error codes are considered start place for troubleshooting:
http://waterheatertimer.org/pdf/ErrorcodeTroubleshooting.pdf
Error code troubleshoot indicates: replace PC board if water heater does not function without remote.

Add a comment and say what you did to fix problem.

73 code is a circuit board error. It typically occurs if you connect or disconnect anything in the heater with power on. Try disconnecting electricity for 20 seconds to reset the unit. If the problem continues, you may need to replace your circuit board.

it is important to turn off

the gas supply to the water heater at the manual gas shut-off

valve. This valve is typically located beside the water heater.

Note the position of the shut-off valve in the open/on position

then proceed to turn it off.

2. On the lower front of the water heater locate the combination

gas control valve/thermostat. Depress and hold

the lock tab located under the gas control knob on the right.

Rotate the gas control knob on the combination gas control

valve/thermostat clockwise until "OFF" aligns with the mark on

the front of the gas valve. Once the gas supply has been shutoff,

remove outer door. 3. Using a 1/4" nut driver or socket loosen the two screws securing

the manifold door assembly until they are free. Do not

totally remove the screws and plastic retainer washers from

the manifold door. The screws and retainer washers will be

needed to reattach the manifold door. 4. In this step, the thermocouple, manifold tube, pilot tube and

igniter wire will be disconnected from the combination gas

control valve/thermostat. Using a 7/16" wrench

disconnect the thermocouple (left-hand thread) and pilot tube

(right-hand thread). Using a 3/4" wrench disconnect the manifold

tube (right-hand thread). Carefully pull the igniter wire from

the igniter button.

5. Grasp the manifold tube and push down slightly to free the

manifold tube, pilot tube, and thermocouple from the combination

gas control valve/thermostat. when installation is complete and gas is back on, You should be able to relight the pilot and the functionality of your gas hot water heater should be restored.

Something is blocked. Turn off water to heater disconnect outlet and attach a waterheater flex connector to tank outlet bend other end into bucket. turn on water briefly - water should blast into bucket.
If not:>>>>>>>>>> disconnect water heater inlet -you may find part of the flex washer stuck into the inlet nipple. Or dip tube may have disintegrated and be plugging outlet nipple, if you have the energy saving nipples the ball can jam debris in the nipple.
If water does blast into bucket >>>>>>>>>>>> Then the problem is farther down the line, maybe bad mixing valve. disconnect mixing valve outlet and use a garden hose to backflush through mixing valve with bucket under hot pipe disconnected from water heater. If flow through valve is restricted, replace valve.

the A3 & E3 codes are for the back flow sensor on the heater. Could be disconnected or a bad sensor. Call bosch tech support and they will help you with this.