As a commercial tech, I have worked on many models and types of rooftop equipment.  One major problem I have noticed over the years is panels not staying put, sometimes it's the fault of the tech forgetting to fasten the screws.  Sometimes it's due to stripped screws that go unnoticed…

Tip: Preparing Wires For Twist On Connectors  By: Gary McCreadie Have you ever come across twist on connectors that have fallen off or when you twist them on, some wiring breaks off inside and leaves the connector useless?  The following video demonstrates a sure fire way to ensure the wires stay intact.  Some techs…