At today’s inspection, I went to check the doorbell and had to pull my finger away from it. It was hot. I felt again and yes it was hot. I asked the realtor and homebuyer to touch it to make sure I was feeling what I thought I was feeling and yes , they agreed. Very hot. I took out my digital thermometer and sure enough the door bell registered 126 degrees. I have never run across this before. My guess is that it isn’t low voltage but line voltage but then again, what do I know, I’m a generalist not an electrician. Any ideas.