The technician spent extra time on the heat pump coild, which was covered in fuzz from the huge cottonwood tree right beside the unit. After giving things a thorough checkup, MVP diagnosed the problem with the heat pump, and said it was no big deal. They got my heat pump working again at no additional charge. They thoroughly vacuumed the inlet and interior of my furnace and fan, and installed a nice new filter. I couldn't be more happy or impressed with their service. Through it all, the service technician was courteous, informative, and patient to explain.