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Honeywell T9 Thermostat Display

drgarner
drgarner Member Posts: 2
in Thermostats and Controls

It is my understanding that the large number in the center of the display shows the actual temperature detected by the sensor in the thermostat regardless of any set schedule. However, today I decided to change the temperature of the currently active schedule by increasing the desired temperature from 70 to 72 (using the app on my phone). Within a few seconds the large number in the display changed from 70 to 72 - and stayed there! I was surprised. I thought the displayed number was always the "measured" temperature by the active sensor (the thermostat itself in this case). I don't know why I never noticed this behavior before. It's like the thermostat display is lying to me (as if I'm an idiot). Does anyone know what's going on here? Is there a hidden configuration item to tell the thermostat to always display the measured temperature? I am smart enough to know what the "desired" temperature is set to.

Comments

  • 109A_5
    109A_5 Member Posts: 2,095

    I don't know, this is what the manual shows.

    image.png

    So the baby is home alone ??? Nice.

    image.png
    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System
  • rynoheat
    rynoheat Member Posts: 42

    I have a T6 and I felt like it was lying to me as well. After doing research(can't remember where) I got the impression it will report a falsely higher temp when maintaining the CPH setting, like a heat anticipator did on an old thermostat.

    It makes sense to do that, so that a homeowner isn't complaining about the heat not coming on when the temp is below the setpoint.

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