Location of a/c - heater blend door?
 

So here is my issue folks

my 1992 svx ac has just started blowing hot. Not warm. Hot.
When i purchased the car i had no air at all. I charged it and it had been working fine for a few months, nice and cold. about a month and a half ago i noticed the blower motor making a strange noise. Then it made a pop and then a sound like its either sucking or blowing are through a small area. Kind of a low frequency hum. I was slightly worried but the ac kept blowing just fine, nice and cold. two days ago it stopped blowing cold all together. it feels like heat is blowing through the vents. I checked the low side pressure and its perfect. the vent to heater blend door actuator is functioning properly. Is there an actuator and door for the heat to a/c selection? if so where is it? I have my 1995 donor car in the back yard so parts shouldn't be a problem. ( i work at a national auto parts retailer and we can barely get anything for it). Is it possible that something is stopping the flow of refrigerant? would that not cause my low side pressure to build and read high?

Any help would be much appreciated
Thanks

Re: Location of a/c - heater blend door?
 

just found this in the how-to section. http://www.freeautomechanic.com/airconditioning.html sounds like my problem.

Re: Location of a/c - heater blend door?
 

Located under dash, passenger side, close to center console. The motor that operates the door can be seen using a mirror or, a tight squeeze to look under.
No. 2 in the diagram below.

When mine started blowing hot air, it turned out that the nylon gear that operates the metal rods, one for cold side door, other for warm side, was worn and jamming. Ended up replacing the motor assemby. One bolt, electrical plug and unhook the 2 rods. Would have been easy if there was room to work.

[IMG]http://i231.photobucket.com/albums/e...SVX/heater.gif[/IMG]