I have a ATP32U04 Thermostat, starting to get cooler here now I noticed that when the unit starts up it moves to second stage after 5 minutes and will satisfy in second stage.
This is not how it run last year or the year before, it would run in 1st stage for a lot longer then change to 2nd stage and de-stage when close to temp.
I have reset it to default, and turned off the breaker to the heat pump for 30 minutes and still have the problem.
We did have a thunderstorm a few weeks back that we had a couple of brown outs, but geo was not running at the time.
If I change the algorithm to Differential from Proportional integral it will stay in 1st stage unless it drops a couple degrees. So I could use that, but prefer the Proportional integral as it keeps my temp steady at 70 degrees.
Any ideas from Climate Master Installers? I searched the internet and found one person that solved it by reset and power off, I will attach a link.
http://www.geoexchange.org/forum/th...ge-2.4974/
Like to see if I can get any help here before calling the installer, don't think the thermostat is covered under the 10 year warranty.
Thanks
John