Heating performance tuneup times one system. Advised client that the filter needs to be changed within the next two weeks. Check all safety features high limits and roll outs. Engaged test mode on the IFC three times. Tested temperature rise 42°. Check blower, evaporator and ductwork. No Carbon monoxide or gas leaks detected in home. Remounted thermostat with a blank off plate behind it. System operating at manufacture specs at this time.