Ac and heat issue

My condenser got replaced at the beginning of summer, it never blew as hard as it use to I always had it on max. Every now and then it would blow musty for a few minutes then go back to blowing cold. One morning I got in it and hit max A/C it blew real hard and then slowed down and i turned it off for a few minutes turned it back on but it didn't blow as hard and then it blew musty and cold again. Later in the day when I got back in it made a little noise when I turned it on blew very slow and cold for a few seconds and then stopped and started blowing warm. Tried again and it did same thing blew slow and cold for a few seconds and then warm. Tried heat and it blew a little. Next day it blows nothing now. A mechanic told me some hose was clogged but I don't know which one it would be! Please help!