When a standard tank style gas water heater stops producing hot water it means that the gas burner is no longer producing the flame necessary to heat the water.
Gas water heater not heating up water.
Possible reasons for the malfunction include.
Depending on the cause of the problem the solution can be extremely simple or complex and expensive.
Usually it will be a broken heating element thermostat or gas valve that leads a homeowner to consider a replacement.
If water leaks into the thermostat it could cause a malfunction and result in no hot water.
The tank is leaking.
Pilot light flame has blown out.
The gas flame at the burner should burn steadily with a bright blue flame.
A gas water heater cannot heat effectively if the burner is dirty or not functioning properly.
With proper maintenance you may be able to keep your water heater in service for up to 15 years.