Came out today for one system hvac service call. Upon arrival customer stated this his basement system that was installed less than 6 months ago isn’t working. During inspection found the thermostat was calling for all stages of heat including emergency heat. I found that the outdoor heat pump not on. Upon further inspection found outdoor unit was out on high pressure do to a stopped up filter. This system is a two ton and only had 1.5 tons of duct. The indoor coil also has sheet rock dust built up on it. Upon further inspection found the heat strips not working but receiving a call to be on. At this time system is back on and working but not proper till parts are replace and refrigeration added to system