TomH

I bought the car (85 GSL-SE) in December, so AC has not been a priority, but now it's time to get it figured out and I don't have an owners manual. Right now when I turn the Blue/Red dial to cold and turn up the fan I get air coming out at my feet. Since it's about 65 degrees outside, it's hard to tell if it's AC or just outside air.

First of all, the little lights on the top of the buttons don't work. The lights that illuminate them work, however. Is there a fuse that control these seperately. According to Haynes manual they should be on the same fuse as the radio, which does work (sort of). What do I need to look for to get these buttons to work?

Also, how do those buttons work? How do they move the cables or levers that open and close the various vents.

Where is the AC supposed to come out, the center console or the vents by the door? The vents by the doors have two symbols, the top is wavy lines and the bottom is a fan. What does the 'Heat' button do? I thought that if the Temperate is put in the red, you have heat. Can you have the Heat and Defrost buttons on at the same time or can only one of those 4 buttons be 'on'?

Any help would be appreciated.

aussiesmg

iTrader: (1)

I remove the A/C as a matter of course, sorry not much help am I...lol

Rotary Weasel

lol..mine works yet I removed the belt for it!
you have the computer controls on your SE..since the lights aren't working..do try to listen for the sound of the vent switching when you hit the recirc button..just to make sure it's actually functioning..if it is then depress both the a/c and recirc buttons and turn the fan on 2-3 clicks..make sure you depress the vent button as well...if cold air doesn't start to come out shortly..you're short on freon..however you may have some other issues there as well..

steve84GS TII

Its possible the Logicon (or Rogicon,as the Mazda book puts it,heh,heh..) is bad.

They are very prone to failure in the 2nd gens,and Ive heard the 84-85 cars with electronic controls are known to fail too.First check the fuses.There is a 15AMP fuse under the dash that feeds the control box and a 20AMP fuse for the blower motor.If they are both good,youll have to dig into the dashoard for an answer.I have seen 84-85 logicons on Ebay for about 75 bucks,so they are obtainible if yours is toast.It could just be a loose or corroded plug.

The vents on the 84-85 cars are a little odd.They dont all flow the same air and some are unable to distribute hot or cold air at all,depending on the switch positions.Heres the info straight from the FSM......

For Rogicon(heh,heh) style cars(GSL/GSL-SE).....

VENT......heater core bypassed....center,crotch and side vents flow cold air.

BI-LEVEL.....heater core in split flow.....center,crotch and side vents flow cold air....defrost,floor and side defrost vents flow hot air.

HEAT......heater core in full flow......floor,defrost and side defrost vents flow hot air.

DEFROST......heater core in full flow.....defrost and side defrost vents flow hot air.

I believe the AC system is after the blower,but before any of the diverter doors in the dashboard.Thus,you can send conditioned air to any of the vents you choose.Air conditioned air doesnt always mean cold,just dry. Air conditioning with the heat on is actually very pleasent in the winter or on a cool,humid night.The setup of our vents allows you to mix it up between hot and cold air,even if its been dried by the A/C previously.

But, you are limited in what vents you can deliver hot or cold air to.The crotch,center and side vents are for cold air only.The defrost vents are for hot air only,unless you turn down the red/blue heat dial,and your heater control valve actually works.

The levers on the side vents are for outside,force fed air.In the fan position,they are plumbed into the blower venting.In the wavey postion,they are plumbed around the blower,directly to the outside air vent at the base of the windsheild.Airflow is determined by vehicle speed.