I recently bought my first home and I can say I am very happy with my purchase so far other then the issue I am having with my heat pump. The system is old in HVAC years (20 years old and original to the home) and I would not have purchased teh home because of this but the seller offered a home warranty so I felt a little better about it. I have noticed that at random times the Emergency Heat indicator will click on at the thermostat and the outside unit will cut off and the system will strictly run on the inside unit. I am then able to back down the temp and the indicator light immediately turns off and once the system cycles off I can return the temp to its original position and the outside unit will kick back on. I am concerned about calling my home warranty service to have them come out because as some people have said this could just be faulty thermostat that is sending the wrong message to the system or it could be that the system itself is faulty and in that case I will gladly call the home warranty service since it will cover any replacement or repair. I have no real knowledge of of heating and cooling and any information you could give would be great.
I'm not sure if this matters but I live in Maryland and since I have been in my house the temp outside has dipped below freezing at night sometimes and gotten as high as 70 during the day.