Hello. I’m bought a home with Geothermal Unit . It was a Waterfurnace Premier 2 that was heating and cooling 1700 square feet. The unit was 21 years old and was tripping the high pressure light when temperatures were over 90F outside and humid. My set point was 72F and when things would heat up Temp would go to around 75F in house and it would trip the high pressure error light and shut down. I was constantly having to reset the circuit breaker just to get unit to kick in again. I was having to reset the breaker three to four times per day. I decided that it was a good time to replace the unit. I put in another Waterfurnace Series 3 , 3 ton unit. It seems to work ok but it is not able to maintain a 72F degrees set point. It can climb as high as 78F before cooling down at night. Then around 1:00am it eventually cools back down to the set point of 72F My question is . Is this normal with Geothermal cooling? Should I expect that in very hot and humid weather that the house temperature will raise to 78F or higher with a 72F set point. Should I raise the set point to 78F and consider this how the system works? Or is there a problem with the system. Any advise is appreciated.