Bobbo wrote:
I agree that the symptoms are not explained. That is why I have posted this here, hoping someone with more knowledge can enlighten me.
The red light in the tester is a light bulb connected between neutral and ground. The only way I can see the red light coming on is if neutral is not connected to ground (and the strands power up the neutral). This could be an open in the plug, the receptacle it's plugged into or anywhere in the wiring all the way back to the main panel.
If the neutral and ground both have
good connections from the receptacle you are testing all the way back to the main panel where ground and neutral are connected, it's not possible to have a voltage potential across that red light.
I think I'd plug s decent sized load into it and measure the voltage on everything.