Customer said that the unit was blowing out hot air. Found the reversing valve to not be engaging into cooling mode. Checked thermostat and everything was set up correctly. After turning thermostat back on the reversing valve engaged just fine. Checked operation of unit and it shut down after about 10 minutes, this was most likely due to a power surge that seems to of reset the cable as well. Unit ran for about 10 minutes before shutting off again. Found filter to be dirty so I replaced the filter with a customer provided one. Unit turned off again with the thermostat satisfying at 75 before jumping up to 77 shortly after. This is most likely caused by the vent in the bathroom next to the thermostat to be putting out a lot of air making the thermostat read a touch lower. Turned thermostat way down to watch it run for 20 minutes with no issue, when I turned the thermostat back off the temperature did not raise shortly after. Thank you for your business.