Overheating no hot air in car
I just bought this car 5 days ago, it ran like a raped date for the first 2 days.
It started over heating on wensday, it was a cold night 0-15 degrees maybe.
Now to the technical stuff... We changed the thermostat the original one was covered with almost a silicone gunk like they used fix-a-seal, changed the coolant/antifreeze, bleed it from the bleeder.
The mechanic hooked his magic computer thing up to it and it said the intake air temperature senos is reading -40 degrees f idk if that has anything to do with this.
I took it for a couple road tests and it seems to stay at 200 degrees if I beat on her, and if I drive conservatively it over heats.
I also tried a breather test in the radiator and the coolant tank, no sign of co2 present meaning no head gasket issues.
Idk what else I can do. I just bought this car and I'm brokeeeee haha any imput is much appreciated.