But he said the water heater is filled up and that it doesn’t work on gas either.
To the OP....if you open the outside water heater access cover look towards the top and you’ll see a brass valve with a small silver lever on it. If you lift the lever you should have a good flow of water. Cold or hot at this point. If you do NOT then Cavie is correct and you don’t have the unit out of bypass mode and likely will need to replace the heating element although it should still work on gas. If you switch your water heater to gas can you hear the burner running when you look from the outside?
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