2000 V70 Climate controle reset

Maybe someone has had this problem. I have found about 8 people on
the web with same issue as me...
-- I disconnected the batt from the +post in the front of the car ( my
batt is in the back ) . When I reconnected, almost all of my modules
needed to be reset. Inside lights, Grage door home link, locks, etc.
I found on the web a way to reset all of these but the two that are
left are my climate control ( automatic - dual controle + heated seats
and fan control ) this module is dead..no power at all to it. After
much research, I see that there is a protocol to follow when replacing
a batt..( found out too late ) Does anyone know how to fix this? The
fuses are all OK.. From other posts, Volvo dealers try to soak you
for a new module ( $750+ )..Ouch
Oh ya, also need the Airbags light to be reset.. it too can on after
the Batt was disconneted..
Thanks