Arrived at our clients home for a single system cooling maintenance inspection. I began outside by testing the condenser drive board and ensured it had no faults. I also washed the condenser coil as part of today’s maintenance. Everything passed on the outdoor unit. I then proceeded inside to the attic unit. Our client provided an air filter to be replaced today. I did find the blower wheel with dust accumulated on it and also the air scrubber cell was burnt. I showed my findings to Larry and he elected to replace the air scrubber cell as well as pull and clean the blower assembly. Once the blower assembly was cleaned and dried I replaced it back into the system and tested it to ensure proper operation. Everything is working properly on departure.