Most likley the automatic circut breaker for the a/c system has tripped. If there is hot air when you wanrt cool the a/c system is not working. So either the high ir the low circut is tripped, check the systems a/c charge for proper fill. Then trouble shoot again.

Means there is a problem of some kind with ac,,,,,,check ac ,,needs to be done with ac gauges to check presures