My ancient package unit would run a little while and shut off on hot days . Low electric bills. But got a cracked heat exchanger. Bought a new package unit same brand same size now ac never stops running and electric bill tripled temp in house always 3-4 degrees warmer than set temp . Called installer back 6 times .replaced thermastate 3 times , got lower efficiant filter . Called 2 other companies to check unit nothing wrong they say . My house has 2 units so I still have the twin to the old unit on the other side of the house runs a little and shuts off set it to lowest setting that side of the house got so cold I had to turn it off . My vents are ice cold on the new machines side but air flow is low the room farthest from the unit needs a heater in the winter. Now . And is hot in the summer . All I can think is the airflow output is too low the blower has burned out twice so far it has a high or low wiring and is wired for high so the repairman say . Can the blower motor be replaced with a higher air output? Blower motor goodman brand?? Maybe this is our answer? My older unit got a cracked heat exchanger and they offered to replace the unit or repair it for 1200 bucks .having nothing to lose I bought a new heat exchanger and tools for under 160 and repaired it myself in about 5 hours . Now they want 1100 to replace the blower motor on the new unit I still have the tools from fixing the older unit lol

$1100 for an air handler blower?

That's what I said lol . And another 700 for the motor on the top of the unit . I'm thinking of going from the medical field into heating and ac business. That's what I get for letting them talk to the wife. She thought it was a great deal 1800 dollars