I investigated the xterra and removed the blower motor. i can see a radiator and fins, but i can't tell if its the evaporator or the heater core. it would be useless to spray the heater core. i need to determine if the unit closest to the blower motor is the evaporator or now.
check the video to see the basic technique.
looks like the unit close to the blower motor is indeed the evaporator. sweet.
and this makes it 100% positive. thats the evaporator.
If I had to pull the dash to do the evaporator, and I was going to keep my truck for a long time, I'd probably do the heater core and vent actuators while in there. Just so I know I don't have to pull the dash for a long time
I was just informed mine needs to be replaced. The dealer has been trying to find leak in AC since 2012. They showed me what needed to be taken apart and told me I have to remove and or move all the wiring in my dash that I have added out of the way before they replace it under warranty. They said it will take 2 days to put it in after I do that This will not be fun.