What is this?? in the outside electrical Panel
It's a vacuum pump, it pulls a vacuum on that black plastic ball, that's the vacuum reservoir. It's usually used to actuate the blend door functions of the hvac stuff!
If the port that does not have a line hooked to it pulls a vacuum on your finger, it needs a hose on it, once it pulls a vacuum on the system it will turn off, if it continues to run because of a leak, it will eventually burn up or pop a fuse, seen them do both. Might look for a loose hose....
2013 Georgetown XL 350
2002 F250 4X4 CC
2012 Jeep Liberty