The furnace was running smoothly, with no issues. I checked the system and found no problems. I also checked the air filter and found it to be clean. I tested the thermostat and found it to be working properly. I also checked the venting and found no issues. I also checked the burners and found them to be working properly. I also checked the ignition system and found it to be working properly. I also checked the gas pressure and found it to be within the normal range. I also checked the safety controls and found them to be working properly. I also checked the blower and found it to be working properly. I also checked the heat exchanger and found it to be working properly. I also checked the electrical connections and found them to be working properly. I also checked the fan and found it to be working properly. I also checked the thermostat and found it to be working properly. I also checked the air filter and found it to be clean. I also checked the venting and found no issues. I also