When I turn on the air only hot air blows out. was diagnosed and found that the electric fan mounted on the condenser won't turn on. Fuses and relays check out ok as does coolant. What controls the fan?

Question edited for clarity, add maker and typo 'Alima'.
Question moved from AC Cars, maker of the AC Cobra.

Let's deal with the overheating engine first.

You may have air in the system

https://www.fixya.com/cars/r29872074-vehicle_cooling_system_no_heat

Or is may be the coolant temperature sensor not turning the radiator fan on, fan relay, or the fans themselves.

There are a number of things that could be the issue. Here is the fuse box diagram. You have two fuses and a relay covering the Air Conditioning.

https://fuse-box.info/nissan/nissan-altima-l31-2002-2006-fuses-and-relays

The system may need refrigerant gas, but check the fuses and relay first as it sounds electrical because the green signal light isn't on..

Much of the issues you have are ultimately controlled by the Body Control Module and you may have a computer communication issue. The only way to diagnose that is by an auto electrician with a pro grade scan tool computer to check modules, sensors and the computer networks. This is not a $125 scanner, they cost between $3.5k to $5k.

it means you have a fiver

To clarify, the compressor and fan will run in defrost mode. The compressor and fan runs to dry out the air blowing onto the windshield.
Now if the condenser fan runs in "heat" you may have a problem with the fan relay or the main controller.

the ac system needs air through the condenser ( radiator bit in front of the radiator) to operate correctly. IT it has no air then the compressed gas is to hot and will not turn to liquid and so the high pressure switch turns of the ac compressor. No problem when you are moving as road speed provides the air flow. Get an electric fan and have it installed before the condenser and connect it to the ac compressor circuit so that it is running all the time you have the ac compressor running. not the local mechanic.When dealing with ac systems the best people to take it to is an accredited ac specialist shop

More then likely the valve is open on the heater hose , there are two small hoses running from the engine radiator to the heater radiator , one has a valve or tap that is open to heat and closed when the air con is engaged, make sure it's not frozen open.

no, your condensor fan motor is not working. if its faulty, install a new motor. not the fan leaf, only motor assembly. its cheap too. but first you have to check refrigerant leaks. then check condensor fan. thanks

Have you radiator clutch fan check out, sounds like its bad, air blows through radiator and a/c condenser while driving and no air blows through at stops, will cause a/c pressure to go up and not cool.

The fans are inportant but the regular raditior fan will do it and the road speed of the car will blow enough air though the codenser to make it cool if it's going to. Does the compressor turn on? if it does do the lines hooked to it get hot?( the small one) and the big one get cold? The condenser should get hot, Hot enough to burn you and the freon level may be wrong and or the compressor isn't pumping. ( brocken inside)

fazsoliz: If the A/C system is not properly charged, it will not cool properly. Usually it is noticed at low speeds because the compressor is turning slower. If you bring the RPM up, you would probably notice it would start to cool a little better.
HOWEVER, there is a danger if the system has been over charged and you do not have enough air flowing over the condenser to keep the head pressures down. The hotter it is outside and the more overcharged the system, the higher the pressures will be in the system. They can reach dangerously high pressures in excess of 300 psi. This can cause hoses to blow, a/c evaporators and condensers to fail and compressors to fail.
If the refrigerant is contaminated or if the system had been opened and had not been properly evacuated before charging, it could have moisture in it as well as air.
The fan which is driven by the engine is attached by a viscus coupling (designed to offer more resistance as it gets hotter, thus making the fan turn closer the the engine's rpm's). If this part is not working properly, it will not make the fan turn fast enough at slow speeds to draw the air over the a/c condenser and radiator.
I have found in very hot climates, that installing an electric fan in place of the engine driven fan made a vast improvement on the performance of the a/c at idle and low speeds. I have an old Mercedes diesel wagon which I converted from R-12 to 134-A.
The a/c would freeze you out on the highway, but you would be better off rolling the windows down in town. I removed the engine driven fan and installed an electric fan. Now the a/c will freeze you out at low speeds if you bring the rpm up to 1100, but is cold enough even at 700 rpm.
You must also check for any type of debris caught up in the a/c condenser. The more trash accumulated in the fins, the more difficulty it will have in dissipating heat. The fan schroud also must be on the radiator, otherwise the fan will have little effect in pulling
air over the condenser.
Also, put the system on recirculate after a minute or so. This way you will be cooling the air in the cabin and slowly bringing the temperature if the cabin air down and not having to fight the need to constantly cool hot air coming in from the intake vent.
I hope that what I have offeref for suggestions will help you.

has the radiator been flushed and serviced? check hoses, how about the fan clutch???