Customer stated he noticed the uv cell led not on. Checked air scrubber found uv cell bad, replaced ozone cell under warranty. Tested for proper operations made sure air scrubber was on properly and made sure unit was properly operational, customer didn’t want for me to check refrigerant pressures and unit has been cooling properly. Unit was on properly before departure. Recommended sanuvox to complete IAQ package and keep evaporator coil sterilized. Customer declined recommendations at this moment.