Pretty common that people lack understanding of how heating and cooling work. They assume if they turn up (or down) the thermostat that it will make it work quicker to reach a warmer or cooler space and do not know that the unit outputs what it outputs until the temperature setting is reached. Thus they are constantly adjusting the thermostat instead of picking a temperature and being done with it.
On top of this is the bodies ability to heat or cool itself so that at times we feel warmer or cooler at the same ambient temperature.
Your Mother Crowz has likely adapted overtime to be comfortable at a very cool indoor temperature and will resist any changes. I would suggest getting the thermostat moved into the area she uses most. At least than she has the setting and thermometer to look at and it should act to modify what she puts up with.
I'm not changing the temperature in the room she is in I'm trying to get the ac to cut off. She can have it as cold as she wants.
Its been running wide open since late february from what I can tell. When she got cold she had people put pillows over the vents in the room she stays in instead of adjusting the thermostat. Its crazy. She's bed ridden for the most part (hospital bed setup in the livingroom) so the caregivers I hired adjust the thing for her and they are as old as she is and have no concept of how it all works.
Here's a list of what I'm dealing with.
Dining room = thermostat (set to 66) = 75 degrees or more in room from vent issue
Someone closed off all of the vents into the room so no cool air is getting to the thermostat so it never cuts off.
Livingroom = 64 degrees to 66 degrees depending on pillow vent blocking
Bedroom 1 = 80 degrees (all vents closed)
Bedroom 2 = 50 to 52 degrees (all vents opened)
No one ever enters this room. Complete waste of cooling.
Kitchen = 65 to 68 degrees (1/2 vents closed)
Bathroom1 = 49 degrees (vents open and door closed all the time)
Bathroom2 = 90 degrees (vents closed and door closed)
Laundry room = 70 degrees (no vents but gets airflow from kitchen)
Basically its a comedy of errors.
I've got some of the vents adjusted but my mother had my son take the vent covers off in a some areas and put duct tape across the hole in the wall for the vent and then put the vent register back since the vents were "stuck" when she tried to get him to close them. It was their idea of a "fix". So Ive got to remove the tape which means removing the vent covers which I didn't have time the other night to do. I will be tackling this over the next few days.