Ignition or Pilot Control Issues:

• Ignition Problems: Faulty ignition or pilot control can prevent the furnace from starting.

• Pilot Light Issues: A pilot light that won't stay lit may be due to a thermocouple issue or gas supply problems.

Airflow Problems:

• Blower Motor Issues: A malfunctioning blower motor can lead to insufficient airflow.

• Ductwork Problems: Leaks or blockages in the ductwork can reduce the efficiency of the heating system.

Thermocouple Malfunction:

• Failure of the Thermocouple: The thermocouple is responsible for shutting off the gas if the pilot light goes out. A malfunctioning thermocouple can lead to gas supply issues.

Thermostat Malfunctions:

• Incorrect Settings: Incorrect thermostat settings or calibration issues can result in inadequate heating.

Circuit Control or Electric Ignition Problems:

• Faulty Circuit Boards: Malfunctions in the circuit control board can disrupt communication between system components.

• Electric Ignition Issues: Problems with the electric ignition system can prevent the furnace from starting

Short Cycling:

• Frequent On and Off Cycling: Short cycling may be caused by issues with the thermostat, filters, or airflow.