Had a Daikin modulating system put in last year. Modulating gas and FIT A/C.
Twice I called the contractor back during the summer because the house was getting too warm overnight. It seemed the thermostat was almost randomly off by 4°. They swapped it out both time.
Later I figured out that the lighted display screen and spiffy little LED underbar (to show it's working heating or cooling) were influencing the thermostat.
We calibrated the thermostat during the day, when both features were turned on.
I had the display on continuously as a clock and the underbar was showing the red or blue to let me know it was running. Come bed time I programmed the night dim feature and turned both the display and underbar off.
I'd go to bed at the same time the lights shut off thinking the house would stay at temperature.
So now with less heat being generated by the thermostat itself it would cool down while the house heated up, driving the person constantly setting the thermostat crazy! There was about a 4° temperature in the thermostat reading between display lights being on or off.
Display screen and underbar light are now off!! (The display lights momentarily if I touch the screen or dial to make changes.)
Anyone else notice this?
I'm trying to do some temperature tracking to see if there is also an issue with the system being over sensitive. Heater is runner forever in the morning but I think it is because the wall is cold and influencing the air around the stat.
Twice I called the contractor back during the summer because the house was getting too warm overnight. It seemed the thermostat was almost randomly off by 4°. They swapped it out both time.
Later I figured out that the lighted display screen and spiffy little LED underbar (to show it's working heating or cooling) were influencing the thermostat.
We calibrated the thermostat during the day, when both features were turned on.
I had the display on continuously as a clock and the underbar was showing the red or blue to let me know it was running. Come bed time I programmed the night dim feature and turned both the display and underbar off.
I'd go to bed at the same time the lights shut off thinking the house would stay at temperature.
So now with less heat being generated by the thermostat itself it would cool down while the house heated up, driving the person constantly setting the thermostat crazy! There was about a 4° temperature in the thermostat reading between display lights being on or off.
Display screen and underbar light are now off!! (The display lights momentarily if I touch the screen or dial to make changes.)
Anyone else notice this?
I'm trying to do some temperature tracking to see if there is also an issue with the system being over sensitive. Heater is runner forever in the morning but I think it is because the wall is cold and influencing the air around the stat.
source https://hvac-talk.com/vbb/threads/2235516-Daikin-One-plus-thermostat-heats-itself?goto=newpost
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