A couple of weeks ago I noticed the blower would kick on at random on the house ac unit even when it did not call for cooling (outside unit not running just inside unit). Sometimes it would run for 30 seconds then shut off. Sometimes when it does call for cooling when its done it will shut off then a couple of minutes later the inside unit will kick on. I was not sure if this was some sort of feature or what. Anyway, last night I noticed it was starting to get cold in the house and it had been blowing for a while. Thermostat was set to go to 73 at night. It was 71 inside temp indicated in the thermostat which was below the set temp. The outside unit was running but it seemed to be stuck. Not sure if it is a thermostat issue or some sort of control board issue on the inside or outside unit. I turned the thermostat off and it continued to run. I even actually removed the thermostat from the wall base plate so it was not connected and it still ran. Question is, should it not completely shut down if the thermostat is removed or if the stat was stuck in cooling mode and sent signal to the unit to turn on, will it continue to run until a signal is sent to turn it off so in other words even with thermostat removed it is not sending the off signal? I ended up flipping the breakers off for a minute then back on. I am thinking the outside unit did not come back on but the inside unit did and blew for a while then eventually shut off. Sitting here right now I am thinking I am having the same problem. I just cant figure out why it seems to only do it at night.


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