AC switches compressor ON/OFF too quickly

I had to replace the compressor on this thing after 6 years, would like to extend the life of this one. The thing switches it on and off too quickly, under 5 minutes, I've heard this is bad for the compressor, you should wait around 10-15 minutes after turning it off to turn it back on again. It switches that quick because I have a window open and an exhaust fan running 24x7 for important reasons. It still cools down the room very well. How can I change it's logic and set a minimum time before the compressor kicks in?

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  1. 1 month ago
    Anonymous

    >How can I change it's logic

    not a snowball's chance in hell
    you can only work around it
    ex.: set the unit to max cold and use external thermostat to activate the remote to switch it on/off

    • 1 month ago
      Anonymous

      >not a snowball's chance in hell

      Modifying the factory logic yes, but adding your own controller might be possible if OP is truly a PrepHole guy. I've never modified an AC unit, but aren't they just one or two fans and a compressor? Add one or two temperature sensors and a microcontroller and SSRs and have fun.

    • 1 month ago
      Anonymous

      >set the unit to max cold and use external thermostat to activate the remote to switch it on/off

      This is totally doable with home automation. But it would require some overhead cost if you don't already have any home automation already in place.

      I'm running a Home Assistant server, so all I'd need is a smart outlet and a temperature sensor to make this work pretty easily.

      Seems like it would be easier than

      https://i.imgur.com/0963Nbn.png

      >not a snowball's chance in hell

      Modifying the factory logic yes, but adding your own controller might be possible if OP is truly a PrepHole guy. I've never modified an AC unit, but aren't they just one or two fans and a compressor? Add one or two temperature sensors and a microcontroller and SSRs and have fun.

    • 1 month ago
      Anonymous

      Nah, it's EZ.
      >find a room thermistor
      >not the coil thermistor moron, leave that one alone
      >splice in a resistor+relay in parallel to it, IDK 10kohm or so
      >experiment Black, resistors are cheap, you can even add a pot
      >set ac to high temp, something like 30c/90f
      >have an external logic board control the relay
      >when relay closes the ac thinks temperature in your room is suddenly over 9000 and kick on

      • 1 month ago
        Anonymous

        I think this is my best option, to create my own temprature control circuit and hook it up to where the thermoresistor connects on the board. Connecting the pins to a lower and higher resistance resistor to switch the compressor ON or OFF. How do I get an arduino or something to do the following-
        1. Measure resitance of the thermoresistor
        2. Connect the pins on the board to a different resistor when thermoresistor reaches a target
        3. Wait 15 minutes before checking to see if whether it should turn the compressor ON by switching the relays to the higher resistance resistor

      • 1 month ago
        Anonymous

        https://i.imgur.com/C6AKy1T.png

        I think this is my best option, to create my own temprature control circuit and hook it up to where the thermoresistor connects on the board. Connecting the pins to a lower and higher resistance resistor to switch the compressor ON or OFF. How do I get an arduino or something to do the following-
        1. Measure resitance of the thermoresistor
        2. Connect the pins on the board to a different resistor when thermoresistor reaches a target
        3. Wait 15 minutes before checking to see if whether it should turn the compressor ON by switching the relays to the higher resistance resistor

        Are you guys moronic or just bored? The system already has controls. Just break the voltage going to the contractors coil with a time delay relay

        • 1 month ago
          Anonymous

          I am actually moronic. What are the odds that this hong kong ching chong bomb blows up my AC?

          • 1 month ago
            Anonymous

            >blows up my AC
            absolutely nothing actually
            it itself may blow up if it cannot handle the current but it should handle it because most split ACs won't draw over 10A unless they are especially big
            unless the relay is full of shit but once again, the chink relay may melt to shit but the AC won't be harmed

            • 1 month ago
              Anonymous

              I'm only going to wire it up so that it disconnects the signal wire to the main contactor running the compressor. No way this little shit can handle anything close to 10A.

  2. 1 month ago
    Anonymous

    https://duckduckgo.com/?q=hvac+hysteresis&ia=web

  3. 1 month ago
    Anonymous

    are physically hitting the on/off switch on the remote/mhk2? the unit doesnt ever actually shut off, it just goes into a very low state to meet the setpoint.

  4. 1 month ago
    Anonymous

    i hate these room AC units for that reason - they try to maintain an exact temperature by switching on and off too quickly which is really annoying - it would be better if it tolerated a wider temperature range by remaining off for a longer period ... here's a guy who added one for external unit

    • 1 month ago
      Anonymous

      this is not an inverter condenser. this trick will not work. they dont have contactors like normal split systems, everything runs off the inverter board.

      • 1 month ago
        Anonymous

        It does have a contactor that is used to switch on the compressor. Any sane ideas on what I could do with that?

        • 1 month ago
          Anonymous

          get an inverter unit poorgay

          whatever the frick you want then since it's clearly not an inverter it just has 2 states, on or off

        • 1 month ago
          Anonymous

          Lmao this dude out here with the mr cool minishit. Get a real AC.

          • 1 month ago
            Anonymous

            >Get a real AC.
            what about a mini split is not "real AC"
            it's far closer to a central unit than a window unit
            they made over 30K BTU even but I struggle to see quite where you'd use one that big

            • 1 month ago
              Anonymous

              Any minisplit that isnt an inverter, ie using a contactor, is not a real ac. Its real chinkshit. If op is so concerned about his conpressor he should get a brand with something to stand behind.

  5. 1 month ago
    Anonymous

    take it apart, find thermistor and wrap in in foil tape or foam or something
    slow down how fast the temp sensor can sense changes in temperature

  6. 1 month ago
    Anonymous

    >because I have a window open and an exhaust fan running 24x7 for important reasons
    Grow your weed somewhere else.

    • 1 month ago
      Anonymous

      Exactly. Original post stinks. No good.

  7. 1 month ago
    Prez/o/

    Set it to max, if it’s on its own circuit install a wifi breaker. The app will have a loop timer.

  8. 1 month ago
    Anonymous

    replace the starter lockout device. the delay is never in the logic but controlled by the starter itself.

  9. 1 month ago
    Anonymous

    I've never seen a modern inverter mini-split actually turn off its compressor under normal usage, unless you manually change the set temperature. They usually start at high speed, ramp down a bit while cooling/heating and then once the temperature setpoint comes close start slowing down the compressor gradually, until they reach equilibrium, after which point they maintain that very slow speed.

    Non-inverter ACs are either 20 years old or US windows/central air units.

  10. 1 month ago
    Anonymous

    Check your thermostat.

  11. 1 month ago
    Anonymous

    >It switches that quick because I have a window open and an exhaust fan running 24x7 for important reasons. It still cools down the room very well.

    well, theres your problem moron... its detecting a change in temperature and turning the compressor on... its doing exactly what it was designed to do. they dont design these so moronic idiots can just leave windows open and expect it to KEEP the room cool.

    I bet you have the window open and exhaust fan cause you smokin weed all day or growing the shit. frick you, dont blame the appliance for not working properly when you are the cause of it.

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