I arrived at the customer's home to perform a routine maintenance check on their heating and air conditioning system. I ran the unit in the air conditioning mode to check for a temperature split and to ensure the system was operating efficiently. I also checked the amps and ohms of both the indoor and outdoor units to ensure they were within the manufacturer's specifications. I checked the wiring and pressure on the outside unit to ensure it was functioning properly. Finally, I performed a radon test to ensure the home was safe for the customer and their family.