I recently replaced the heater hoses and heater control valve on my 95 940. It wasn't exactly fun, but I do not remember cursing even once :)
All poster full of very good information. Change the hoses for sure. Can't stress enough the importance of cutting the hoses off the heater core. And do not cut all the way through the hose such that you cut into the soft copper nipple. If you do, the new hose may leak.
I suggest you do not cut the hose off the nipple as if you were performing a circumcision. Instead, use a slight spiral to "unfurl" the hose from the nipple. If you cut through the hose and just down to the nipple, the hose should peel offn easily.
just my .02
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