I recently purchased an '05 V50 T5 AWD. Everything worked fine when purchased. While I disliked the "auto" Power Window feature of the Drivers side - I figured I would get used to it.
About 2 weeks ago - I noticed that the "auto" function stopped working on it.
I didn't think much of it (my preference really) until I reallized that now my rear windows are both in "auto" mode. They now go down automatically when I touch the rear or master switch. Problem is when they go up - they go all the way up and then go down part way on their own.
I have to very delicately feather the switch up in micro touches to get them to go up just a tiny bit at a time so they don't reach the end of their travel or they automatically come down again.
So here it is in a nutshell:
a) Drivers Front - No Auto up/down function - just like a regular power window.
b) Passenger Front - Auto up/down - works just fine
c) Both Rear Door windows - Auto down/up but just keep going down about 2-3 inches when they reach their upper limit.
Funny thing is - both the master switch and the rear door switches work like this. I am used to my V70 where if it was going to mess up - it would be one or the other not both.

I am thinking that the circuit board is somehow corrupted (needs cleaning?). Then I need to know where the controlling board is before I can look at it.

Any suggestions/advice are welcome. Then I have to figure out how to repair.

 

Could need a software reload.

 

Just take it to ur local volvo shop that has VIDA Diagnostics computer and have them calibrate the DDM and PDM. That will fix ur window problems.