Thank you Jim and all. The bad news is the neighbor called to say she had not turned off the nightlight this morning, so it must be something else. So we are in the 5% case. Then her electrician called and I am meeting him in about 3 hours. He thinks it is the heater and is ready to look at bonding. I will bring the info from Jim K9YC. 73, Leigh/WA5ZNU