You need to turn off the button that say AC on it. You need to change the temperature and the fan adjustment. If you have the AC button turned on, the fans will blow cool air even though the heat is turned on.
SOURCE: ac compressor cuts on and off and no cool air blows out .
Too many reasons why but it probably needs to go in for repair. compressors will cycle on and off if the system is under or over filled. If there is a flow restriction, a collapsed high pressure hose, clog somewhere in the system(some vehicle owners put sealant or refrigerant with sealant in it) bad idea. Good luck.
SOURCE: Ac bows hot air on high when on auto- only on the drivers side
the vent channels behind your dash is where the problem lies. It mostly depends on you and your skill. You are going to have to get help also because the dash lifts up and rolls back twards the driver and passanger seats. what you have to do is first check the cable or vacume assembly that operates the vent controlls, make sure nothing is disconnected or broken. If all the cables are in place and move correctly and the vacume hoses have all been pulled off and checked for crackes wholes and functionallitgy. then start checking the seals and vents that route the air flow. find the one that goes to the driver side make it move with your hands then see where the movement comes from also check the seals if they are broken or have come off and are just not allowing air to be channeled to that location. Also make sure that if the control pannel in the dash board is good. Usually if its electric and bad there is a specific smell you will get from burnt electrical boards or components.
Taking a dash off is not the easiest work in the world, and you have to remember wheere every single screw, bolt, nut and clip goes. If you forget one single thing the dash could ratle squeak or do something that will totaly drive You INSANE for the rest of your life. I am not trying to say don't do it, I love DIY'ers but think about if your ready for this. Is your skill where it needs to be and do you have the tools needed for this task. Also, I would buy a Chilton, it will have ilistrated pictures and special notes. I hate saying this also but read the entire procedure first before starting I once took the entire dash off of a chevy blazer to replace the heater core just to find out I had to cut a molded plasitc shield under the hood. Had to put the entire dash back together without replacing the heater core because I didn't have a cutting device for the plastic shield.
Hope this helps
Tepfy
SOURCE: 1993 Volvo 850 AC
A/c system is undercharged, this rapid cycling of th compressor is a sensor issue and the improper temps at different locations of the system is being detected. Simply adding refrigerant is a very poor practice. It's quick and just as temporary. A properly serviced system eliminates these constant problems and repairs and the needless expense that comes with them.Good Luck and keep in mind that a clutch that cycles like that will not last long.
SOURCE: 1998 Buick Century Air Conditioner not blowing out cold air
My 98 Buick Century was doing the same thing. Up here is the north we have Canadian Tire. Went in there picked up a aircon recharge kit called RED TEC 12A hole kit costs $40 cnd I put 1 can in on the low pressure side which is the only fitting that the filler would fit on and now I have 33 degree air coming out of the drivers side and a couple degrees colder from passenger side.
I am sure you guys have something like Canadian tire down there you might even try Wallmart.
SOURCE: heat blows out driver vent when ac on
this problem is caused by a defective air temperature control blend door actuator motor, it is about center of dadsh in air ducting, it moves the door that diverts air for cold from ac or hot from heater, you must remove the dash to repace it, about a 15 hour job fotr a home mechanic with a factory repair manual, nearly imposs without one.
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