I’ve heard that there are 2 challenger model no. that are faulty. This panel was installed in 1985. I’m wondering if anyone has heard of that and if so do you know model number of the faulty panels?
https://www.nachi.org/forum/f19/challenger-panel-30250/
http://inspectapedia.com/electric/Challenger_Electrical_Panels.php
It seems the links contradict themselves. Nachi guys saying no problems, and inspectapedia saying yes… but after all I did just scan thru it briefly while on site.