My air conditioner makes a weird noise when I turn the fan on and it will not blow cool air.

start with using a meter to test for power start from fan back to switches need to check harness and connectors

I would check the fan motor for the heater sounds like the bearing is going out. Does it scream and then go quite or rumble if so it is probably the heater fan. It will run and blow air but it will make a lot of weird noises. If you shut the fan off and the noise goes away it is the fan.

1. Could be a caught foreign object between A/C (air conditioning) fan and cooling radiator, producing this loud noise.
2. Could be a damaged fan blade, mowing the cooling radiator.
3. Could be a loud noise comming from the fan's electrical motor.
4. Could be a broken off fin (small wing) of the cooling radiator, striking the A/C fan, producing this loud noise.

The radiator fan may not be blowing.
Idle car with parking brake engaged.
Turn OFF Air Conditioner
Pop open hood and look at the radiator fan.
It is not spinning.
Turn ON Air Conditioner and look at fan.
The fan MUST be spinning.

Replace the "Radiator fan" relay switch.
Check primary fuses and replace as needed.

When you turn on the AC pop the hood. If it has an electric cooling fan or an electric fan infront of the radiator and condensor then its normal for it to come on. Without air flowing through the core the AC will not blow cold air. You just may not have noticed it before, or the fan is wearing down and producing a bit more noise than before.

You have a fan temp sensor located on the engine block that controls when fan turns on or off.

Take it to a garage and have them evacuate the system and refill with refrigerant. you have air and non condensibles in the refrigerant system.

check the compressor with the ac running and make sure the compressor is kicking in and out in not the compressor might be bad or te clutch on te front of te compressor, sometimes u can get to much freon in them to i did it ounce

If the fuse is blowing there is too much resistance in the cooling fan moter. Replace JUST the cooling fan motor and the fuse. The A/C always turns the cooling fan ON when turned on. That is why the A/C messes up when the fan motor is bad. Replace the fan motor and the A/C problem will be fixed too. :)