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New goodman 2.5ton and 2.5-3.5 airhandler installed 8weeks ago, worked well for about a week, then the problems begain, heatpumps reversing value replaced already, but unit still does not cool well,when first install air coming out of inside vents were between 55-60, now air coming out of vents cane range anywhere between 64-70, the hotter the day outside the worse it gets, also on hot days the unit runs all the time in three hot days only shut off once or twice and that was for only 3min at a time, any suggestions would be helpful, the company that installed the unit has been great, out numerous times, have contact Goodman, with no luck to date.

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There could be several things wrong. The unit could be undersized but since it worked fine in the beginning, we'll rule that out. There could be a refrigerant leak. Check and see if the evaporator coils (inside furnace) are sweating all the way to the top. The new refrigerant in these units makes it absolutely critical they be charged correctly. The expansion valve also requires adjusting sometimes, if so equipped. Just keep talking to the installers. It sounds like they will eventually get it right for you. Sometimes it takes several trips to get everything adjusted perfectly.

Posted on Jul 28, 2010

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