Arrived to do silver club maintenance. Was greeted by the customer where I was shown where the furnace and thermostat were located. Heater was running when I arrived. While checking out the furnace, I looked at all aspects of the furnace. Checked all motors for the proper voltage and amps. Checked flame sensor, igniter, all safeties, pressure switch, evaporator coil for cleanliness, blower wheel. Gas valve and gas pressure. System is working properly at this time with no repairs needed. Did mention to the customer about our hole home purification system.