I added a heater to a new tank that I am setting up. When I checked the water temperature this morning, it wasn't as warm as I want it to be, so I turned the heater up. The indicator light did not turn on. I turned it up all the way and still no light. The heater is warm to touch, so I know that it works, but apparently there is something wrong with the indicator light.
This is a used Thor 150W heater. Should I replace it?
This is a used Thor 150W heater. Should I replace it?