Edit: can’t believe I didn’t describe the issue. The thermostat itself is just unresponsive, blank screen. It’s not receiving power. It doesn’t appear to be a model with batteries btw, as I see no way to open any of the back portion of it.

Edit 2Am I an idiot? I don’t see a battery compartment anywhere:

https://ibb.co/hYDhVYH

Also I can see from the voltmeter that the C-R labeled wiring is receiving roughly the required voltage. https://ibb.co/Yfh5W1C

Heading to the hardware store to buy a multimeter.

I threw some circuit breakers in the house last night while investigating a light, but they all should’ve just been in the kitchen.

The user manual says nothing of real value to me. I’ve thrown the AC, heater, and other circuit breakers. Anything I can do other than check with a multimeter and then call a technician?

https://digitalassets.resideo.com/damroot/Original/10014/33-00182EFS.pdf?_ga=2.88827611.1567563007.1669391413-594870340.1669391413

  • Des [she/her, they/them]
    ·
    2 years ago

    weirdly i have a honeywell thermostat i'm about to hook up too but stopped when i realized my current one that came with the house is wired strangely. talked to an HVAC family member yesterday and he said that miswiring the common (return) wire or the (typically red and black) voltage wires can do stuff like that. do you know the model of your air handler?

    • copyleft [none/use name]
      ·
      2 years ago

      Sorry, I don’t know the air handler model. I could check a bunch of things?

      It looks like the circuit supplying voltage is still providing roughly the measurable power needed to operate. https://ibb.co/Yfh5W1C

      • Des [she/her, they/them]
        ·
        2 years ago

        do you have any access to the inside unit? behind the return air vent (where the filter would be)? do you have a seperate furnace and air handler maybe? usually the brand and model number are on the inside unit. mostly so i can try to pull the manual for it because it will have it's own thermostat wiring info usually the color coding it uses and the voltages. for example i just have a heat pump with an electric strip in it so there's just a single air handler.

        • copyleft [none/use name]
          ·
          2 years ago

          It ended up just being a dead thermostat, got a dumb version to slot right in and it came up fine. Thanks for your help!