[Albigger]

Hi everyone,

1st post here, read thru quite a few threads and I know there are some knowledgable people here that can probably help me out.


Short story:
2 year old goodman furnace, old AC was 21 year old Rheem, 2.5 ton unit. Now just replaced with new 2.5ton Weather King. New unit, coilset, and A-coil.

Previous problem:
Unit was constantly running and couldn't keep the house cool. If it was 85 outside, the house wasn't any cooler than 80, and thats with it running all day. After installation of new AC, the problem basically is the same. This is a split level house, and there was never great airflow to the upstairs, but now I have to put my hand ON the vent covers upstairs to even feel the airflow at all. Could the blower in my goodman furnace not be strong enough to handle the house? Maybe the new A-coil is too restrictive?

Additional details:
Located near Cleveland, OH
House is split level, built in 1961, 1650 sq ft.
Furnace is in basement. Main plenum has 5" ducts feeding the lower rooms in the house. A rectangular 8x23" duct feeds the upper rooms. There are 18 total house vents (but I keep the one in the garage closed off, as well as 2 in the family room, and the 3 in the basement). The family room is on the first floor, and is always cool. The living room is 1/2 flight up, and this is where the thermostat is. It has a high ceiling (no attic over this portion of house). Another 1/2 flight up are all the bedrooms, which are usually 5-10 deg hotter than the main floor.
I seem to get decent (not great) airflow from the vents on the main floor of the house. The air is pretty cool (but not REALLY COLD).

Furnace is Goodman model GMH80903BNAB
90,000 BTU input, 72,000 BTU output
1/3 H.P blower motor, 10"x8"
it also says on the label:
"tested to 15in external static pressure"
I couldn't find any info on rated CFM, RPM, a pressure chart, or anything like that.

AC is Weather King model 13AJL30A01
R410A unit
13 SEER

I would say the air on the outside unit is only slightly warmer than the surrounding air (maybe 10 degrees?)

I have also had someone pop open the cover on the A-coil and it had a lot of condensation on it but no ice. Also they checked and the furnace blower is set on the highest setting. I've replaced the furnace filter with a new one (and even tried running without it for a few hours but didn't make any difference). I've also tried closing off all the first floor and main floor vents to force the air to the bedrooms, but this didn't work either. Also, there are no dampers in the vents in the basement, I only have control at the vent covers in each room.

OK, thanks for any advice or help. If you need more info. please ask and I will try to get it.