I have a 6 year old Goodman 3 1/2 ton "split system" heat pump; the
compressor is about 40 feet from the air handler. The heat comes on,
blows hot (108 degree) air off and on for a few minutes, then blows
lukewarm (78 degree) air for hours, seldom reaching the thermostat
I've got a graph that shows the pattern over a couple of hours:
So, with the thermostat at 70, the air in the vent starts at 64.
Within 10 minutes, its over 106.
Then at 25 minutes, it drops precariously to 76, then immediately
returns to 106/108.
It stays at 106/109 for another 25 minutes, then drops again to 74.
It spikes a time or two, then settles in at about 78 for hours, with
occasional spikes down to 74 and up to 88.
The temperature in the house never reaches the target of 70 degrees,
hovering around 67/68.
My repair guy (who first sold it to me) seems unable to remedy the
problem. About yearly, he checks/replaces heat strips, rewires and
replaces the thermostat, adjusts some differential, and declares it
working. But any meager improvement seldom lasts very long. He says
the drops and spikes are normal.
What's your take on it?