Customer is having issues with the furnace that serves the first floor, Mid-level, And a few room rooms on the second floor: At arrival, check thermostats, and they are all satisfied at temperature. Call for heating from the thermostat and test system operations: * Check furnace in the attic- System fires blower motor is on and running and operations appear normal * After about five minutes of running, the system is shutting down on high limit switch showing an error code of 33 at the control board * Confirm that this system air filter is clean and clear * Confirm that the blower motor is on and running * Remove the damper inside the ductwork to confirm that it is open and not restricting airflow * Perform powder cloud test on system- Getting blowback from multiple sections of heat exchanger * Also tested capacitor on blower motor and found that it was reading low of 8.4 Microfarads * The capacitor was replaced, and the system was tested and again within a few moments, the system sh