Short cycling occurs when the AC has much more capacity than the heat load of the house. The AC turns on and cools the house very quickly. Quickly could mean 10 - 20 minutes. The short amount of time does not allow the AC to lower the indoor humidity. You feel cool but your are still sweating. It becomes a problem if you live in an area which has high humidity. The 5 ton capacity refers the size of the condenser. The blower in the air handler is adjusted to work with various condenser sizes. Your handler may be able to work with a smaller condenser. I don't have a good feeling about the installation contractor. He has done a poor installation and appears to be avoiding you. What type of warranty does he provide? Make sure you document the problems and stay on top of him.

They're selling snake oil. There are so manys thing wrong with this proposal. First off, why do you feel you're not getting enough airflow? Is the room they used for their demo hard to heat or cool? If the existing 370 cfm is enough to keep that room comfortable, then there is no reason to pay money to increase the airflow. "More" is not always better. Your air handling system was designed to move air as an enclosed system. OF COURSE it's gonna move more air if you rig it to operate with the fan cover door opened. But again, more is not always better. I'll bet you could stand in that back room and *hear* the air rushing and whistling out of that vent after they took the blower door off. Your system should be set up to move the required amount of air as quietly as possible. You're also risking damage to the blower by making such a drastic change to the static pressure. The fan is designed to work against some amount of resistance. Lessen or remove that resistance and you could burn your fan motor out. A return in the basement is going to bring extra humidty and musty odors into your home. The air conditioning unit would have to work harder to remove the extra humidity. It could actually cost *more* money to operate. And if the unit was not capable of removing the extra humidity, you end up with damp air in your living quarters. This results in a cold, clammy feel that makes you feel uncomfortable. If you have some rooms that are hard to heat or cool, have a reputable HVAC company *calculate* how much air needs to go to each room. It's not a guessing game, and more is not always better. I noticed that you called the original installers and they blew you off. Forget them, they don't sound very professional. Try asking some of your neighbors for referrals, or check something like "craig's list". There has to be a reputable company in your area.

I too am having the same problem and very similar to Sparky. I too have a Goodman unit that was installed about 4 years ago and the outdoor unit replaced again after a year and it failed. I too have just noticed cold air blowing out and apparently it is during the defrost cycle. I put a hout thermometer on it and it will normally run around 84 degrees at the register but at times will run about 68 degrees. The temp outside has benn mid 20s to mid 30s. The furnace guy came out and said the filter was plugged and had kicked out the heat strips. I questioned this, but figured he knew what he was doing. After he left if continued to happen and had him out again. He 'added' a board to turn the unit off during defrost. Doesnt sound like that can be done from what I read. In any case he left and the unit continues to do the same thing. It sounds to me that the heat strip must not be coming on during defrost. What part that might be is probably the question. Does anyone know if the heatstrips have an interanl 'breaker' or theraml cuttoff. I know I checked the breakers back at the panel and the breakers on the indoor unit and they were normal before the heater guy showed up and told me he had to reset these. Any thoughts or possible solutions from the others that are experiencing the problems please let me know.

I ended up blowing out the air with the compressor. It got a lot of it I think but I also used the bread trick as well. One of the pipes still was wet inside and the bread dried it right up. Also ended up chopping the ends off some heater hoses and using that for flex line. They don't sell 3/4 copper flex at my home depot but do sell the copper heater connection hoses. Anyhow, no leaks now and all is good! Thanks for all the responses, really helped me out!