It sounds good. The AC no being cold could be related to blockage in the evaporator by dirt and dust. It is not mentioned anywhere except in the big fat book from Volvo: Climate units, but the evaporator should be taken out and cleaned every 3 to 4 years. You will not believe the junk collected there. If the car has 151K miles, that is equivalent to 12 years of normal driving. So, it may be due for a cleaning. Some kind of stupid engineering in these old cars. I hate the new front wheel drive Volvos, but they did one thing right and that is putting a filter before the fan in the climat unit.