Ac blowing hot air low coolant no leaks

What is your question?

17 Chevy Sonic LT 1.8 hatchback Dealership said condenser was bad change it took back in 2 weeks same thing said had defective condenser 1 1/2 months later back again to the Dealership this time the check engine light comes on. Scanner said coolant temp sensor put the Dealership did not tell us that . Dealership said the coolant was low but no leaks. Filled it up with coolant and it is working waiting for chevy forum to get back with them and this is a Chevy Dealership. The AC fan stayed engaged the whole time the car is running