Decrease the temperature of the thermostat to make sure the system is working properly look at the blower will to see if you need a service and it was 0% impacted air filter was knew it was just change by the customer and they normally change the filters once a month other unit was clean with coil cleaner checked the capacitor on the outdoor unit in the amperage is still high no expose wires in the indoor system return boxes also clean no gas leaks was detected clean the thermocouple on the water heater check for gas leaks at the water heater no gas were detected offer the customer the IAQ 2000 they do not have any system enhancements. Made sure that the pilot light came back on on the water heater customer was not interested in getting any system enhancements at this time due to the purchasing a new systems and tight on money