What is the cause of blowing fan control amplifer in my 2002 nissan pathfer

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.

The fans are drawing excessive current or a wire/connection is shorting out causing high current draw. Is it still under warranty ?

Control modules are very sensitive to poor grounds, it causes the current to ground through compnents and damage them. Get a wiring diagram find the grounds and repair them first.

Wiper motor is bad.Here's a new one. Wiper Motor 2002 Nissan Datsun Altima 4 Cylinders 2 5L SFI DOHC...

Heater core may be clogged. Try flushing it to see if water flows through freely. Also check the heater water control valve for restrictions.

what circuit we talking about? be specific..

only it you is employed at the number 4 for which you have the fan bad control amplifer this one serves for the control of the speeds and eta located behind lower right side of dash. Thanks

replace heater control switches

I have a 2002 nissan Maxima. The AC controls only blow on level 4. No air or heat blows from level 1-3. What do I need to do to repair this problem?