Installed brand new 2 ton a/c unit 6 months ago in a 1966 Southern Florida, 800 square foot home... Humidity hovers around 57-63% during the day and for some reason gets worse at night... averaging 60-70% A/C worked fine when it was initially installed last August. Thermostat ALWAYS set on same temp, 76 degrees but over the last month it doesn't remain 76 inside. By 3-4pm everyday it's anywhere from 80-85 degrees inside and it's than h*ll. Unit does catch up at night or if it rains and cools down outside but humidity gets worse at night... Early this morning it was 74% and it was miserable. Cool but sticky! Coils were a little dirty but they've been thoroughly cleaned (oddly, the humidity readings actually increased after cleaning them....?) My electric bill has QUADRUPLED last month. Two A/C companies have come out & checked everything: EVERYTHING IS FINE... The last company that came out is trying to tell (convince) me that my new roof, which used to have white singles and now has black shingles is the cause. (yep... they actually told me this). This is so far beyond ridiculous... Iff this were the case I could see the electric bill increasing somewhat but it stands to reason that the unit would at least be able to cool the house down without running 24/7... right? Can anyone please help me figure this one out? I can't stand the heat but i can at least deal with it... but my 12 year old dog cannot: she has severe heart failure and she is truly suffering. *Black shingles.... Woohoo! Now that's some serious BS

Model: RRGG - 10E37JKR Thermostat control: White-Rodgers 1F86-244 AC has been working fine for a month or so. Last week i noticed that no air was coming through the vents while the unit was running. I turned the unit off, waited a few minutes, and turned it back on again and it worked. Now it is doing the same thing, but wont return to normal. I reset all the breakers in the house, and the big one out at the AC unit, and made sure the air filter in the house was not dirty. The unit seems to run as normal, but no air is coming in through the vents. Outside at the AC unit, the big fan on top of the unit is running. Hoping that someone can point me in a good direction to figure out what is going on. firedawgsatx provided me with this wiring diagram last winter: [ATTACH]52598[/ATTACH] FYI - This is a heating/ac unit... this winter people on the forum here helped me troubleshoot and replace a faulty gas valve on the heating side, and i also replaced a cracked heat exchanger cell. This probably has nothing to do with this issue, but im just letting you know what ive done on the unit. Thanks for any help!