Wh does my A/c sometimes work and sometimes doesnt

Question

1. Sometimes my cold A/C works fine but sometimes its real hot

Answer 1

P0068 Throttle body airflow performance

P0141 H02S Heater performance sensor 2

P0068 will put you in reduce engine power mode, this will turn off the A/C.Check for any vacuum leaks at the MAF (mass air flow) air duct leading to the throttle body,If anything you will need a throttle body.