As a child our furnace could only be serviced by one very old man. When he died, we had to get a new furnace. The new one did not work right for a long time, but that turned out to be because the thermostat was directly over the main heating pipe in the wall. Once my parents figured that out all was well.
I've lived in apartments where the air conditioning and heating both came from one place and generally those did not ever keep the bedroom especially cool at night.
But this is the first air "conditioner"/heater that I've ever had that was moody!
If it gets worked up it can run like a tornado down an Alabama alley. Blowing heat out like a roaring lion and stopping for nothing. Especially not for something as mundane as the regulator. I've had it run until it was 73 degrees in here one hour and zoom up to 79 degrees the next.
It does not like the dark. Once it gets dark it begins to whimper and moan and blow hot air indiscriminately into my apartment. So, I have found a solution. I turn it off late in the evening and don't turn it back on until morning. That works! Evidently my neighbors enjoy heating the building from their apartments, so I've never had it get below 68 degrees in here.
Then last night I was awakened by a roaring! A grinding! A horrible, monstrous, loud buzzing sound. I thought, "Oh no, the refrigerator must be going out," because that was all that could be making such a noise. It did not stop so I got up about 4:45 AM and checked on it. It was not the fridge. It was my wall ac/furnace contraption that was turned off! Off!
How can a machine that is turned off make such noise? And it was madly blowing hot air out into the room like some fractious child throwing a temper tantrum.
I couldn't unplug it, so I sat with it until it calmed down and went back to being inert. Then, hoping I had averted a fire hazard I went back to bed and called the maintenance people this morning. It turns out it was trying to save itself. Not my words, the maintenance man. He said it was so cold outside that it over rode being turned off and tried to warm itself.
Nobody is happy this morning. Not me who is sleep deprived. Not the maintenance man who had to come out in sub zero weather on a Sunday morning. And certainly not my moody little ac/furnace who is grudgingly giving me the modest amount of heat, which is all I ever ask of it.