My wife and I am spending time with our daughter and son-in-law while they prepare to have thier first child.
The home is located in the southeastern US. The home is about 8 -10 years old, and HVAC is a heat pump(?) with the heat exchanger located in attic. Compressor was just replaced in autumn. My son-in-law changes the filters about every couple of months.
From morning to mid-afternoon, the thermostat temperature would be at setpoint. By early evening, the displayed temperature would be up to two degrees higher than setpoint. System is on, and a very small trickle water does flow from the drain line outside while the unit is on.
We find the ground floor is much cooler than the upstairs. I understand that cooler air sinks and warmer air rises. But, the upstairs is really warm. We tried closing the ground level vents. I expected a noticable increase in the volume of air blowing out of the upstairs registers, but did not feel an increase. Not very scientific, but I don't have acess to a manometer, and not sure that is the best method to assess system performance. Then, I was concerned that I could cause the system to malfunction by not allowing the air to flow through the heat exchanger, so I opened some back up.
To keep my future granddaughter comfy, what is the best method or process to adjust the cooling in two story house? Or, is there a bigger issue we are missing?