Hello Glory,
I had a similar situation in my home/system. I tried everything to get rid of it (drove me nuts), and finally determined a bad earth ground was the major culprit. I dug up the ground rod by the meter base, and found the thing in a very rusted condition, and the clamps attaching the ground wire had deteriated. I removed the ground clamp, vigorously power wire-brushed the area, used a new and better ground clamp, and then covered that section with automotive undercoating to preserve the connection.
It seems the probelem can appear also when extremely dry conditions occur, causing a less-than-perfect grounding. A good soaking with a sprinkler can help.
I don't know if this will help you, but it sure helped in my instance.
Good luck,
Dan
I had a similar situation in my home/system. I tried everything to get rid of it (drove me nuts), and finally determined a bad earth ground was the major culprit. I dug up the ground rod by the meter base, and found the thing in a very rusted condition, and the clamps attaching the ground wire had deteriated. I removed the ground clamp, vigorously power wire-brushed the area, used a new and better ground clamp, and then covered that section with automotive undercoating to preserve the connection.
It seems the probelem can appear also when extremely dry conditions occur, causing a less-than-perfect grounding. A good soaking with a sprinkler can help.
I don't know if this will help you, but it sure helped in my instance.
Good luck,
Dan