At least 4 times wihin the past of couple of years, i had called A/C maintenance people to take a look at my a/c unit for not giving cool air. They all found freon level was too low. Filled the freon, tightened the valve here and there. But few weeks later, the same problem again. One a/c guy said coil was leaking and gave me an estimate of $3000 to replace it. i called other a/c guy for his opinion. He said there was nothing wrong with coil system. Coil is in my attic. i did notice, attic gets cool when i run the a/c although there is no a/c vent in attic. then i found out there was cold blow of air coming from joints around the coil system box. is it normal to get cool air blowing out from coil system? I taped all those joint openings. i also hear some hoarse/dry noise coming out of the coil in the attic that i do not hear from another coil system in the first floor (we have two a/c system, one for each floor). Eveytime a/c guys show up they fill up the freon, clean the shrubs around compressor, tightens the valves, but the problem does not go away. i wanted to put this problem here before calling a/c guy for the fifth time. what should i ask him? why they can not fix the leak which is the obvious problem?

Ok... I would really really appreciate some help... My outdoor was not running... So I changed out some items.. A new circuit board... And a new capacitor... My question is about wiring the capacitor... Because the old one was rusted over I am trying to figure out the new schematic.. The capacitor has a F, C, and H.... There are 4 wires that connected to it... 1 - from the contactor - I connected that to the (H). 1 - from the temp gauge inside the box... I think... It is a little round object attached to the coil.. I coinnected this one to the (C) 2 - from the fan... I connected 1 to (F) - 1 connected to (C).. Is this right.... Everything started and appears to work fine.. Heat when heat... Cool when cool... Now the stupid questions ... ok I know coming out of the box, there are 2 tubes.. hi and low side.. one is thicker than the other... First, which one is which.. in heat mode.... is the fan supposed to be blowing out or sucking air in.... and the 2 tubes.. hi and low... should they be hot or cold.... in cold mode.. is the fan supposed to be blowing out or sucking air in.... and the 2 tubes.. hi and low... should they be hot or cold.... because there is a good amount of heat that comes of the unit in cold mode... thanks in advance...