My AC is in the attic and has a pvc drain line that doesn't seem to be working. The water drain pan fills up every day and the float switch in the pan automatically shuts off the AC. I poured some water down the drain line (using a funnel) from the attic and saw that the water drained properly through the length of the pvc. (I disconnected the drain line from a bathroom sink drain and watched the water drain into a bucket). So the problem is that I can't find any clogs in the drain line that would cause the drain pan to fill with water. I think my next step will be, to start opening the AC unit in the attic to examine. Any suggestions? Thanks,

5 yr old split Lennox unit. Noticed high temp in house. First checked interior fan - it was just recirculating room temp air. Then checked compressor unit outside - Noticed that the condenser fan was not spinning. Compressor appears to be humming, but no diff in temp on pipes. Opened service panel to check voltage across different connectors and definitely have voltage to fan & compressor from capacitor. Fan motor is very hot. I popped the lid off the unit, tipping it up to vertical to get a good look at the fan motor. Spun the blade just to make sure it was free and the fan motor engaged (look out fingers!). When I put the lid back to horizontal the motor immediately stopped again. Is this more likely to indicate a problem with the fan motor or with the capacitor? Any specific things I can check? Thanks for any help.