Glad you found it. Most people don't realize that driveshaft angle changes under load. At 40 mph the drivetrain is under load just from the wind resistance. That's why it's usually set at about 3 degrees static and moves close to zero while driving. And before someone chimes in, driveshaft angle...
Is the blower motor on when stopped? Yes= It's a vent issue (vacuum and flaps). No=It's a motor or voltage supply issue. Anything temperature related will only affect the compressor operation via the hi/lo switch. Engine temp/fan clutch is irrelevant.
Cut the webbing so you can dissasemble everything. Clean, lube and put it back together. Tape the belt together and send them to the place I mentioned. They will reweb them and your belts will be like brand new and OEM quality. $99/belt. 2-3 point doesn't matter. Since my plastic covers were...
Why wouldn't they be that hot? It should be the same temp as the rest of the system. Mine has a solenoid valve that blocks off the heater core completely unless I want heat inside. If piping hot means 200 degrees your worrying about nothing. Those temps are actually pretty cold, partly because...