Came out today for a no heat call. Upon arrival the homeowner stated that the call for heat would end but the blower would continue to run. I powered the system up and called for heat . I observed the system firing up , I let it run for about 5-10 minutes then ended the call for heat. I observed the blower continue to run for about 5 minutes and then shut down. This is normal operation. The system needs to cool the manifold before it can shut down completely. I installed a new Emerson thermostat supplied by the homeowner and charged the quoted price by PA. After the new thermostat was installed I cycled the system multiple times to see if I could re create the issue the homeowner was having. The system is operating properly at this time.