Haven't been in my new (29 yrs old) home long so don't know if this is normal but it worried me. Happened to walk past the water heater and the box on the wall, attached to the water heater, has a door, which I opened. I think it's a timer. What worried me was the light at the bottom of the box was lit up, red. I don't think a red light is ever a good thing. But everyone was closed today. Later the red light went off.
Does anyone know what it is and if it meant danger?
I tried to read the print on the box but it was hard to read and I didn't see anything about a glowing red light.