Evap pump
The pump discharge reducer doesn't matter if it's concentric or eccentric. It's the pump SUCTION that needs to be an eccentric reducer that is always flat on top (F.O.T.) The eccentric reducer on the pump suction reduces pump cavatation (pump catching air).
The evap puts moist air in and th AC take moisture out. So you are making the AC work harder
Most likely the evap line, there is a fuel out, a fuel in ( recirculate ) and a vacuum ( evap ) line.
evap pump code air filter maybe clogged
evap pump code air filter maybe clogged
Right below the cooler.
A heat pump pumps heat in the direction you want it to.
It better have. Otherwise you need a new pump. And that is possible!
Concentric
Right on top of fuel pump, acces under the rear seat
5 to 10 min