Hi, I just want to confirm a few things by the pro's. My AC unit while installed in 2009, had its coil replaced in 2013 due to a leak. So its essentially only 3 yrs old. I've got the following filter pictured below.. I've been very good in keeping it clean. Washing it out every other week, shaking as much of the water off it as heavenly possible, then re-installing it. The filter replacement size would be 22x24x1. As you can see from my coil in the 'before photo' , it was absolutely filthy. I was kind of surprised, given i'd been keeping on top of cleaning the filter and our house is clinically clean under normal circumstances. I'm going to switch out to those replaceable pleated filters, as i'm told they do a much better job at keeping the particles from reaching the coil. I had a tech over yesterday for one of those radio advertised $29.95 services, and he said, there's no real way to fix this, other than a remove and clean the entire coil which would cost $1600. He could do a band aid fix, and spray it out with chemicals and flush it thru and brush what he can get off it for $300, but thing is that the mold / dirt could probably be really stuck deep in the fins and that would only partially help the problem. I asked how much would a new coil be, and well that was only $300 more than the clean. A mere snip at $1900 ?? so why go with a clean in that case. Another thing was fit a UV light and that 'could' help in killing the mold over time. That would be a $1000. i just went ahead and took a shop vac to it this morning, and sucked out as much crap / dirt and mold as i could being very careful to not bend the fins. You can see on the after pic, there's a huge improvement, (despite a bent fin or two) and truth be told, cos of the flash it looks worse than it is, but even so its far from perfect. There's still dirt stuck in the fins. I want to see what my other options are in terms of fixing this problem and giving it a better clean. Which coil flush am i better off buying. How did it get like this in the first place? Can i spray on the outside of the coil as well as in from the inside of the coil, is it safe to take an air hose to it or too risky and may bend the fins? I want as many opinions as possible, to make a proper call on this. It's a 4ton unit, fitted by the building contractor (new home in 2009) The coil was replaced under warranty in 2013 and didn't cost me a penny. Should I clean by thoroughly spraying an indoor coil cleaner and then flushing it out with water? Will that be good enough of a job to fix this, or do i really need to have that coil pulled / replaced ?? Specs from the callout. The temp split start was 64/78/14 The temp split finish was 64/74/14 Fan motor amps 3.6 Compressor amps 24.6 Fan amps 1.1 Here are some pics of my install. Before [IMG]http://s25.postimg.org/iblkqoee7/before.jpg[/IMG] After i took a shop vac to it. [IMG]http://s25.postimg.org/x6a64unz3/AC_1.jpg[/IMG] My filter [IMG]http://s25.postimg.org/et9kuadi7/Filter.jpg[/IMG] Actual unit [IMG]http://s25.postimg.org/jhkzbqdb3/AC_2.jpg[/IMG] Condition of blower [IMG]http://s25.postimg.org/pc9kjgg67/AC_5.jpg[/IMG] Outer side of coil 1 which correct me if i'm wrong, doesn't look too bad. [IMG]http://s25.postimg.org/y26nkaxnj/AC_7.jpg[/IMG] Outer side of coil 2 [IMG]http://s25.postimg.org/htqfatotb/AC_6.jpg[/IMG] other area's of the unit. [IMG]http://s25.postimg.org/iuqnzy5sv/AC_8.jpg[/IMG] [IMG]http://s25.postimg.org/70eboki5b/AC_3.jpg[/IMG] [IMG]http://s25.postimg.org/qd9t8kx5r/AC_9.jpg[/IMG] [IMG]http://s25.postimg.org/rlt3ggzq7/AC_4.jpg[/IMG] Appreciate the help on this.

Air handler won't turn off when Cool setting is on with Auto fan. The compressor works fine and turns off correctly. Air handler works fine when heat setting is on, I.e. Turns on and off with heat. Curious what is different with cool setting. Regular thermostat wiring - red, green, white and yellow.