Thanks for responding. Yes, the main 30 amp breaker is the one tripping. There is a dedicated breaker for the AC but if never trips. As for icing, none I've seen. I know it is draining at least some but I'm not certain if it is draining properly and not building up. Ti check that, would I just take the cover off, turn it on, get on the roof and watch it until it trips? I will also start looking into replacement units. Thanks again
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