Heating maintenance. Checked all test. Checked inducer motor. Checked flame sensor in clean. Checked igniter. Checked blower motor and wheel. Checked heat exchanger and burner assembly. Checked carbon monoxide levels. Checked static pressure which was high. Check for gas. leaks found none. Checked air filter needs to be replaced. Checked humidifier was never reconnected when installing new system. Also big gaping hole at the return when installing the new system. As well as a lot of leakage and flue piping needs to be double walled. Scott, the design specialist out here now given him repair options as we speak.