Performed AC cool check on three systems. Checked the electrical, mechanical, safety, and performance of the systems. I cleared the drain lines and flow tested the drains with water. I also treated the drain lines. Condenser coils were cleaned. The blower wheel on the second house was dirty. Options for repair were presented to Brian and he chose to have the blower wheel cleaned. I pulled and cleaned the blower wheel. I reinstalled the blower wheel and function tested the system. No other issues were found. All systems were running at the completion of service.