Feedback warning system using inducer pulse width modulation signal

A method for generating a status notification of a combustion airflow by a heating, ventilation, and air conditioning (HVAC) system, comprising:

• initiating a burner and an inducer motor of a furnace of the HVAC system, wherein the burner is configured to generate the combustion airflow and the inducer motor is configured to draw the combustion airflow through a tube of a heat exchanger of the furnace;
• establishing an initial pulse width modulation (PWM) signal sent to the inducer motor as a baseline value, wherein the initial PWM signal corresponds to a predetermined airflow pressure of the combustion airflow drawn through the tube of the heat exchanger via the inducer motor;
• receiving a monitored output airflow pressure of the combustion airflow drawn through the tube of the heat exchanger via the inducer motor from a pressure sensor;
• sending a PWM signal to the inducer motor associated with the monitored output airflow pressure of the combustion airflow;
• comparing the PWM signal to the baseline value in response to the monitored output airflow pressure of the combustion airflow reaching the predetermined airflow pressure of the combustion airflow;
• controlling the inducer motor based on a comparison of the PWM signal and the baseline value;
• and
• generating the status notification of the combustion airflow drawn through the tube of the heat exchanger in response to the comparison of the PWM signal and the baseline value.

A non-transitory, computer-readable medium storing computer executable code for generating a status notification of a combustion airflow by a heating, ventilation, and air conditioning (HVAC) system, comprising code to:

• initiate a burner and an inducer motor within the HVAC system, wherein the burner is configured to generate the combustion airflow and the inducer motor is configured to draw the combustion airflow through a tube of a heat exchanger of the HVAC system;
• establish an initial pulse width modulation (PWM) signal sent to the inducer motor as a baseline value, wherein the initial PWM signal corresponds to a predetermined airflow pressure of the combustion airflow drawn through the tube of the heat exchanger via the inducer motor;
• receive a monitored output airflow pressure of the combustion airflow drawn through the tube of the heat exchanger via the inducer motor from a pressure sensor;
• send a PWM signal associated with the monitored output airflow pressure of the combustion airflow to the inducer motor;
• compare the PWM signal to the baseline value in response to the monitored output airflow pressure of the combustion airflow reaching the predetermined airflow pressure of the combustion airflow;
• control the inducer motor based on a comparison of the PWM signal and the baseline value;
• and
• generate the status notification of the combustion airflow drawn through the tube of the heat exchanger in response to the comparison of the PWM signal and the baseline value.