On Saturday, July 1, 2017 at 11:33:21 PM UTC-4, Ed Pawlowski wrote:
On 7/1/2017 11:14 PM, LW1717 wrote:
I have a 1250 sq ft two story house, the upstairs is not cooling down
like the
downstairs. It's 82f outside with 60% humidity, tstat set to 73 and my unit
runs 21 mins and off 10 min. Wondering if my cycle time is ok and how can I
get the upstairs cooler, it stays around 78.
Thanks LW1717


Have you always had a difference? Sounds like a circulation problem.
First, check that the filters are clean so you are getting full air flow.

Next, check the dampers in each room. You may want to close down the
ones on the lower level to get more air pushed upstairs. You may want
to consider better attic ventilation to get the heat out so it does not
radiate into the house.

You also want to check that air is getting back down to the AC so it can
be cooled. If return vents got blocked that adds to the problem.

+1

It's a common problem. A difference of 3 degrees is common. Not having sufficient returns upstairs is common. Adding them can help, but often that isn't possible.

Check the ducting that can be seen to make sure it's intact, ie that a taped joint hasn't fallen apart. Additional attic insulation could help and reduce heating bills too. Finally, installing a mini-split AC upstairs is a possible solution.