Yep, I've already gave him a suggestion to check on the icing, (check the evap' fan & door seals) this newbie seems a bit on the jumpy side of posting,
so I'd say check one thing at a time & you'll find your problem.
Now the capacitor popping is a tad more on the serious side either it blew out because of a stuck start/run relay issue, ( the relay got stuck in the "start" position & the cap' over heated due to the excessively long startup/current draw trough it & vented /blew out & arced & flamed out) if he just replaces it & doesn't tend to the start run relay, the new one may blow too. I'd replace the whole mess with a combo 3-in-1 start/booster & be done with it. the other reason it may have popped is because it was dried up & couldn't handle the current anymore.