engine shuts down with defrost or A/C on

Thanks for your reply. I'm new to car servicing and first time owning some car. What kind of additional information required to help me

Does the engine stall immediately when A/C is turned on?.. Are the radiator cooling fans working? Any noise at all (belt squealing or grinding sound) associated with A/C turning on? .. Check engine light on?

The moment AC turned on the engine stall immediately. Radioiator cooling fans working without any issues. No noise except the car vibrates n stall immediately after turning on AC

That's indicative of a failing A/C compressor, the compressor can actually make the engine stall if it's binding up inside.. You might to be able to tell by turning the compressor clutch hub on the front of the compressor by hand .. **with the engine off** .... It should turn pretty easily... What happens if you try to make the engine continue to run with A/C on by pressing the accelerator?