I know i've already asked about this, but i need more advice before i just go buy a bigger fan.

I have had problems with my a/c since I got my car. It blows nice cold air, and the heater works great, problem with the heater is that it starts blowing normal temp air out after a while.

When i run the cold a/c, my cars temp starts to raise after driving around with the a/c on for aprox 25 mins? I will just take a quick look at my gauges and see my cars heat is in the red, it returns to in the normal after i shut the a/c off and drive more.

When i switch my a/c or heater fan speed from off, to anything such as defrost or max, the cars RPM will drop, then return to normal at random times, frequently.

Can anyone suggest what to do to fix this? or tell me whats causing this, much appreciated!

 

Im sorry everyone, my computer is being dumb i didn't mean to post the same thread twice, idk how to delete it, anyone know?