Originally Posted by
radiodoctor
Good Afternoon,
I own a 4200sq ft home in NJ. The home has a two-story family room in the middle, and a two-story open center hall.
The home was built in 2005. It uses Goodman HVAC equipment.
Whenever it would get above 90 degrees outside, the upstairs of the home would have trouble getting down below 77 degrees inside upstairs. Downstairs would cool nicely, and the downstairs unit would cycle, but the upstairs unit would run forever. Even with both zones set to the same target temp of 74 degrees.
After the first year, I needed to have the two compressors (which are located next to each other) moved from one side of the NW corner to the other due to them being in the way of a major deck project.
Fast forward to May 2008, and now again I'm having difficulty. The other day it hit the upper 70s, and the upstairs unit would not cool down to below 77 degrees. Finally, when it hit the low 60s outside, I was able to get the upstairs down to 73 degrees or so.
My first thought is that either the system needs a charge again, or this system is just garbage.
Now, I think I may have discovered another alarming issue - I think the tech who performed the relocation/move may have reversed the upstairs and downstairs compressors. Right now, the downstairs system is tied to the 4-ton Goodman unit, and the upstairs system is tied to the 3-ton outdoor unit. Which zone should be using the larger compressor - upstairs or downstairs??
I'm an electrician, but my common sense leads me to think that since heat rises, the upstairs unit should be the larger unit, no? The other reason I think he goofed is that when the house was first built, the upstairs unit needed to be replaced when we moved in as it was defective
Another question - when he relocated the units, he removed the line dryer filters internal to the Goodman units and installed new ones outside of the compressor cabinets. Was this necessary when cutting and re-brazing the line sets?
Any thoughts on the subject? Thanks Radiodoctor