My heating and air conditioning switches are confused. The air comes out when I want the heat to come out. How can I fix this?

The temperature blend door is stuck on the A/C side ! Do you hear a clicking noise behind the dash ? Has an electrical controlled actuator that switches a door inside heater - A/C box from A/C to Heat . So the blower is blowing air over the A/C evaporator core all the time , not switching !

the ac and heat are two seperate units, the heater hoses are coming from the heater may be loose or cracked check your fuses and relay switches

the 1 n t center all air comes n on the passenger side so start thier

The heater control valve could be stuck in the closed position. You say that you have no air. Are you saying there is no air coming out of the vents or no Air Conditioning? If you have no air coming out of the vents and you don't hear the fan, could be a fuse to the fan is shot or maybe your switch is not working. If the fan is not working and your driving and your car is up to operating temp. you should feel some heat coming out of the vents or defrosters. The chances of your heater core being plugged up could happen if someone used some kind of stop leak in the radiator and didn't follow the directions. Well that should have you confused enough.

Many vehicles are set up to run the radiator(/ac condenser) fan whenever the air conditioning is on. Might this be the case here - is the air conditioning on when on the open road? Just a thought.

Thermostat is stuck open. Replace thermostat and check water level. Or It's the heater core.

You may have an inoperative switch

1. Check the air conditioner fuse and replace as necessary.
2. Air conditioner system discharged. Have the system evacuated, charged and leak tested by an MVAC certified technician, utilizing approved recovery/recycling equipment. Repair as necessary.
3. Air conditioner low pressure switch defective. Replace switch.
4. Air conditioner fan resistor pack defective. Replace resistor pack.
5. Loose connection, broken wiring or defective air conditioner relay in air conditioning electrical circuit. Repair wiring or replace relay as necessary.

There is a blend door problem.

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HEATING AND AIR CONDITIONING Refer to Section 1 for discharging and charging of the air conditioning system. The heating system provides heating, ventilation and defrosting for the windshield and side windows. The heater core is a heat exchanger supplied with coolant from the engine cooling system. Temperature is controlled by the temperature valve which moves an air door that directs air flow through the heater core for more heat or bypasses the heater core for less heat. Vacuum actuators control the mode doors which direct air flow to the outlet ducts. The mode selector on the control panel directs engine vacuum to the actuators. The position of the mode doors determines whether air flows from the floor, panel, defrost or panel and defrost ducts (bi-level mode).

its the flaper in duckwork under the dash switch from heat to air when u turn the slector switch its a job to fix.