What are the reasons why the electric water heater does not heat but the indicator light is on: 1. The heating function is not turned on, only the indicator light is on, and no heating is performed. 2. It may be that the heating system of the water heater is damaged, and only the indicator light is on. In fact, the heating system is broken and cannot be heated. 3. It may be that there is no water stored in the water heater, and the water heater will not heat it.

This answer applies to the Haier brand EC6003-JT1 (U1) water heater model.