I went to a customers home yesterday and they are having a problem with multiple Afci breakers kicking when they open the dryer door. I went through everything could not find anything. I was able to recreate the problem. I have had a problem like this before where the main neutral was loose and was causing multiple afci breakers to kick. The only problem I had yesterday there was a meter lock on the meter base from the power company. I told the customer to call the power company to check the neutral at the meter and the transformer. has anyone else ever ran into this problem before.