When your water heater is failing to heat your water, begin at the basic level.
Checklist: No Hot Water Solutions
Indicate active power supply or pilot light
Check thermostat settings
Check the circuit breaker or the fuse box
Check evidence of tripped reset button
Make the gas valve open (gas heaters)
In case a failure of these steps to restore the hot water, the problem mi... https://bluepacificcapecod.com/how-to-troubleshoot-a-hot-water-heater-2/