Problem with Gas Water Heater?

The gas stove burners were lit, so I think there may be 2 different issues. Did the pilot light go out again on the water heater? If you are having to re-light the pilot light, it could be air in the gas line (doubt this IF the stove stayed lit during this time) or it could have a problem with the thermocouple. If it is staying light, the problem may be the thermostat control-the box on the outside of the heater where your temperature control knob and the button you push to light the pilot are located. Both of these repairs can be done by a D-I-Yer who follows proper safety precautions. As for the water on your stove not boiling, maybe that has more to do with the minerals in your water, I think it possible that could affect the boiling point. Maybe you should use filtered water for boiling. Also, I think barometric pressure affects the boiling point of water. I think higher pressure increases the temperature at which water boils. I could have this backwards, though.

What you need is a pressure gauge that you can move around to the appliances when they are on. Look at the stove and hwh and see if they have a pressure of what the gas should be going to it. This is normally in inches of water or "wc stated on the appliance or instruction book. Install the pressure gauge and turn on the stove or hwh and see if the pressure drops way down. If it does, you have a blocked line and it needs to be cleaned or blown out. Most people are not at ease around natural gas and you will probably need to contact a piping contractor or the gas company to come and do these tests.

Another clue is the natural gas should burn blue, if there is a lot of yellow in it there is something coming through the gas line that is not gas.

Another issue could be whether the home is set up for propane or natural gas. Make sure you have the right orifices in the appliances for the gas being used.

Make sure all shut off valves are open all the way.

If you make the assumption that the appliances worked before the home was disconnected and the only change was that the gas meter was removed and the reinstalled, call the gas company first and let them know you can't boil water.

there still could be air in the lines.take your range and turn all the burners on full blast and wait and see if you get a full flame.notice are all the burners lit all the way around if not their clogged,you will need to clean them with a piece of steel whool and a straight pin.poke all the holes so they are open.go to the gas meter and make sure it's all the way on.there might be a inline valve behind your range with a lever on it,make sure it's all the way open.same thing with the hot water heater,there should be an inline valve near by. a bad thermo couple can cause it bad gas valve on water heater can cause it and the same thing with the range,it might have a bad gas valve but the odds of both going bad at the same time are slim.if it keeps doing it after all that the it might be a good idea to call a repairman

That`s a good one... It sounds like the sediment issue has been addressed. All I can think of is a "way out there" possibility. It took me a while to find the picture on the link below. It will help show what my idea is maybe. The hot water pipe in the heater is quite shallow into the tank in relation to the cold. Due to the fact that hot water rises and cold water settles down to the bottom to maximize your hot water draw in the tank. If something were to happen to the cold water pipe inside the heater (if it were to become detached at the top of the heater just below where your cold supply hooks up) the cold water would just spill into the top of the heater quickly cooling the water that is being drawn through into your house. Hot water heaters being sealed as they are are difficult to look inside. Maybe remove the anode rod that is in the top of the heater and rent one of those small snake cameras. They are not expensive to rent for a few hours and take a look inside. Like I said, that`s a good one. I wish you luck and hope it all works out!

Call the gas company ASAP. Problems with gas lines are nothing a "do it yourselfer" should tackle. They have the proper tools to test your lines with and will let you know if this is a dangerous situation. Good luck!