Brand New Condenser and Compressor and 2005 Mazda 3 blowing hot air. Why?

Did they change the high and low pressure switches?All so did they vacume the system before charging it?

They did not change the high and low pressure switches. But they did vacuum the system before charging it. Could it be the high and low pressure switches ?

Yes,if one or both are bad,it will cause the freon to blow out,they control the cycling of the compressor,and if bad will continue to run and biuld to much pressure,this may be why you cant find leak,it blows it out all at once,out the pressure release valve on compressor.

Changing all those parts did they change the orifice tube filter or expansion valve depending on which one your A.C system has.

What I can't wrap my head around though. When i changed the condenser the first time. The AC was blowing extremely cold air, it worked for about 3-4 days until I realized that new condenser some how had a leak. That's when i returned it and changed it and this time the compressor too and is not blowing cold air. But i will have the mechanic check the high and low pressure switches! Thank you for taking time to read and answer my question!

@ firebird338 The only thing they changed was the compressor. The mechanic took it out and replaced it with the new one. After which he pulled a vacuum and and put back in freon. Is the leak possibly at the expansion valve?

When changing a compressor you need To replace the receiver dryer/accumulator, and also the expansion valve/orifice tube. Debris can get into the system and will make your ac not function properly.