New homeowner with new AC unit so don’t know much here other than my smart thermostat is telling me it’s time to change the filter. Existing one looks significantly smaller that the space its installed in.

Bonjour ! Est-ce que certains d'entre vous ont la clim Murao smart 3,6kwh et peuvent me dire s'ils en sont satisfaits ?

I need advice or to know if this has happened to anyone else.

​I installed a new GE Heat Pump unit. After installing it, the low line was reading 90 PSI. I added refrigerant R454B and it wouldn't go above 125 PSI on the low line and 300 PSI on the high line. The low-line temperature is 68°F and the high-line temperature is 75°F. The thermostat setup is correct. When I turn on Cooling, it doesn't cool, and when I turn on Heat, it continues running in Cooling mode. I configured the thermostat to 'O' and to 'B', and it keeps doing the same thing and the fun is running good. Please help