AC blows hot air when i stop at an intersection or slow down.

Check to see if the radiator fan is coming on & the AC fan comes on when the AC is turned on. AC Freon may be low too.

sounds like a stuck thremostat

check the freon charge for the a/c system to low can shut off the cutch

you have moisture in the system this causes your expancion valve to freeze up an stop working, thats why it works for sort time and when it de-freezes stars working again. you need to do a EVAC & RECHARGE with a good AC service equipment, specially attention to pull vacumm por at least 20minutes so you get all moisture out of the system.
Good luck

your electric fan for the AC is not working for whatever reason so when idles its all getting hot the engine and the AC system .This sort of work can be difficult to diagnose correctly and a code reader is about as good as a bible at mosque so seek the advice of a skilled mechanic who should be able to pin point the fault in seconds

You're probably low on coolant. The waterpump is pushing a lot of coolant through the engine at higher engine speeds therefore when the engine slows down- less coolant! Check reservoir and add coolant and probably will have to have the system bled.

your ac compressor is freezing up try not putting it on cold all the way. put thermostat towards the red jus a lil but still on the cold side to see if that helps

have you checked your coolant? that might be why its blowing cold air

this is because you have a bad switch which has gone bad and you need to replace it or either try to bypass it through another circuit.

indicates a problem in the fan in front of the condenser
possible loose connection , bad relay or bad ground point