That looks like an awful lot of crud in your heater box. Are your cowl drains clogged? I would check and fix that now! While it is apart, I would check the operation of the cabin fan. Usually you can easily remove it from the lower case half and inspect the brushes and lube the bearings. Then, test for proper operation using jumper wires to a 12v power source. Lots of other Maintenance and Repair that can be done more easily with the console and h-box removed. Have fun!