Technician Joe R. was really conscientious and explained that the blower wheel for the furnace couldn't be cleaned properly without removing it from the housing. He tried cleaning it while inside the housing but not done to his satisfaction. He called before proceeding because it would be labor charge to remove the wheel. I agreed with Joe that this prevention would keep the furnace running perfectly and help prevent problems later. Not everyone would take time to see that something is done right. I was very satisfied.