So I have some scenes set up to control the temperature in the house which are a little (but not exceedingly) complicated and they fail. The basics of the scenes are: temp goes to 64 and an hour later goes to 68. This happens early in the morning and the afternoon. At the end of the morning and at night the temp goes back down to 58. My house is fairly tight so it usually doesn’t get down to 64 ever so the first hour has no HVAC activity. The issue is that after the hour, when it’s supposed to turn up to 68 it instead goes to 70! This happens consistently. Why 70? Also some times it doesn’t go down to 58. I’ll check and it’s set to 62. WTF is that? I have NEVER set my thermostat to either 62 or 70 manually. I have hydronic radiant heat, which I understand may be a no no with a Trane thermostat (I’m not sure if by “radiant heat” they mean all radiant heat, including baseboard water and floor as well as electric resistance, or just electric) but that still shouldn’t cause this kind of nonsense. It didn’t happen last winter with the same thermostat but different heating (forced hot air) in a different house and less complicated scenes.
Does anyone have any ideas about what could be causing this? Really 70 is too hot. I know it’s only 2 degrees but it makes a big difference. Maybe it’s just the way my house is built but the boiler fires up a LOT more trying to keep it at 70 than when I have to go to the dashboard and manually turn it down to 68.
With radiant heat some thrmostats allow you to set a variable to keep them from overshooting the setpoint…in other words the thermostat reaches it’s setpoint and shuts off the system but the heat in the radiator causes the room temperature to continue climbing…does this fit your situation? If so you need to use a thermostat that shuts off before reaching the setpoint.
I hope that is helpful.
Regards
Tim Alls
No it’s not doing that. In fact it obeys the thermostat quite accurately. The issue is that something isn’t obeying my scenes. It actually changes form 68 to 70 about 10 minutes after reaching 68°. Really weird. I could understand it if it were overshooting like you explain but that doesn’t seem to be the case.
No Luup code. I just have scenes that set the heat to 64° and then an hour later set it to 68°. Those are at about 4 AM and then again at about 2:30 PM. Then I have two scenes which set the heat to 58° which run at 7:30 AM and then again at 8:30 PM. I tried some fancy LUUP code to slowly increase the temperature but it was all wacky so I figured I’d better figure out the issues in my current set up first.
BTW, how do I determine if scheduling is on or off? I checked out the menu on the thermostat but didn’t see a way to toggle this function.