Came out today to install a new condensate pump, 30 feet of vinyl tubing, perform preventative maintenance and humidifier service. I removed the old condensate pump and vinyl tubing and installed a new pro select condensate pump. Ran new 3/8 vinyl tubing from the condensate pump to the utility sink. Performed preventative maintenance for a high efficiency Lennox system model #EL296UH110XV60C-05, serial #5915D04887. I powered the system down and removed the access panels. Removed and cleaned carbon off of the flame sensor, cleaned out the burners and burner box. The air filter was replaced on PA’s last visit. Checked all electrical components needed for heating to ensure that they are secure and in good condition. Cleaned out the trap and tested the new condensate pump. Checked to ensure that the pressure switches were free of any debris. Powered the system back up and called for heat. Performed a combustion analysis test and received the following readings, o2 is at 12%, co levels are