I have a Frigidaire FA5186N2A A/C unit. It is just shy of 5 years old. It crapped out on me for the second time last weekend. I have a 5 year extended warranty which will expire soon.
The first time it crapped out, the serviceman said it was losing coolant. He recharged it and it was working OK. Then a few weeks ago, it started icing up and I could hear crashing inside when the ice broke up. And then it stopped blowing cold air this weekend.
I have a service call scheduled for next week (still under the warranty).
My question is mainly should I renew the warranty? It will cost about $175 for 3 more years. Or should I just put the money towards a new machine. This is a high powered machine (I think its 18K BTUs) and runs off a 220 volt dedicated circuit. So my replacement options are limited (I did some quick pricing and I'm looking at $400-$500 for a new unit).
I'm also wondering what might be wrong and what should I tell the serviceman to check.

