No. But you need to make sure the freon in the AC is full.
Connect the Freon bottle to the low pressure port on your air conditioning compressor. Release the Freon into the compressor. The purchase of a Freon recharge kit will make the process quite simple.
Yes a heat pump reverses the function of an air conditioner. Like any refrigerant system if a Technician says "it needs Freon", make sure the leak is repaired first.
Freon is a brand name for various air conditioner refrigerants. Make sure you have the right refrigerant for the vehicle. Refrigerant is added to the low pressure port of the system, which is located 6 inches from the accumulator.
Begin by connecting your Freon bottle to the low pressure port on the top of your air-conditioner compressor. Release the Freon into the compressor. A recharge kit will make this process extremely simple.
R-12 which is very dangerous. And they don't make it anymore. You need to have what freon is left in it flushed out and then get the kit to switch it over to be able to use 134A. You can get the kit and freon at walmart or pepboys or autozone or whatever local parts store you use.
Neither should go in your air conditioner! I assume you mean the radiator which has coolant, but this is not an air conditioner and will not make your air in the car blow cold. If you need coolant for the coolant system then the type of coolant depends on the make and model of the car. However, it is ALL anti-freeze. That is what DEX cool is, but Dex cool is for specific engines. In general, most engines that I have come across will take DEX. What type of car and what year is it?
It is low on freon.
It may be out of the coolant or a bad wire. The fuse could be the issue as well.
Make sure it's draining properly. Condensate, if it is allowed to remain stagnant, builds up an odor. If you have built up mould in the evaporation coil, you may need to have it professionally cleaned. Freon has no odor.
The air conditioner will create extra heat. So if it's really hot to begin with turning on the AC will only make it harder on your cars cooling system. If you haven't had your coolant flushed/thermostat changed in a long time you might want to try that. Also make sure there are no obstructions in front of the radiator.
Some cars have a sensor in the reserve tank that sticks or the sensor on the engine is gone. Get a manual for you make and it will show the locations.