[jlg32281]

The Texas heat is here in full force. I knew my A/C didn't blow near as cold as my other 80, that thing would freeze you out at idle. I was thinking about cleaning the evaporator via the fan hole. I was first stumped by the recirculating air flap in the bottom of the fan housing. While looking at how to pull the fan, I tested the recirculating to fresh button while looking at it and it does nothing. I then crawled into the floor board of my buddies 80 and watched his move. My wife took the truck to a mechanic today (we had a coupon for a free A/C checkup and charge from a booster club coupon book). My vent temp was 74 then he added a can and it dropped to 68, this was with water running over the fins to keep it cool. The mechanic said there was something wrong in the dash and he only messes with the under the hood stuff. Not much of a mechanic I guess. My theory is that the evaporator is super dirty from constantly running fresh air because the recirc doesn't work. The charge is right and the compressor seems to work. The little lights on the A/C controls work and correctly light up when switched to fresh and recirc. I would even be OK with rigging it to run recirc air all the time. Any all suggestions are welcome.

My specific questions are:
Is the recirc flap vacum or electric driven?
How do you pull blower fan?
Clean the evaporator (and not the aerosol foam stuff, I really want to clean it)?