We have 3 heat pumps (all ducted). Yesterday I found 3 of these in the attic space. Since they say Mitsubishi and Wifi, I am assuming that are Wifi controllers for the heat pumps.

The question is, are they really Wifi controllers. And how do they work ? They need to be wired to something. Do they need additional hardware on the heat pump ? Do they work with no indoor highwall unit ?

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I just found an online installation manual to install it inside a wall unit. I would still like to know if they can be used with the outdoor unit or the ducted system in the attic space.

  • Reading the manual i think you should first locate the port if it exists in any place if they exist then it should be a simple matter of running some jumper wires from this port To the controller and check if it flashes or connectible to router then you can probably double tape it somewher
    – blabb
    Commented Sep 17, 2023 at 8:17
  • 1
    I have similar looking WiFi interface for my Mitsubishi aircon. It connects to the indoor unit, not the outdoor unit
    – Remko
    Commented May 12 at 8:52

1 Answer 1


It appears that they are generic Wifi controllers for Mitsubishi Heatpumps (ACs). I sold them to someone who just slotted them into his units and they worked.

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