Demand call for heat pump from 2020 using filter 20*25*4 not cooling properly. Upon arrival customer showed me the thermostat and mentioned that it was running properly up until he changed the air filter and it started just throwing out 65-68 degree air out of the vents. At the air handler itself I was getting 76 coming into the machine and 59-60 coming out. During my inspection I checked electrical connections and components, checked pressures, checked for any signs of airflow restrictions, and inspected cleanliness of the condenser outside. The only thing I noticed was that the suction pressure was at 150psi or a little bit higher, I performed a pump down to check the compressor valves and it passed that test. After reviewing my pressure readings and temperature readings with my supervisor we both came to the conclusion that the system has a bad a TXV in the indoor coil. I showed the customer all my findings to better help him understand what was going on with his system. The cu