Abstract: A temperature monitoring system for a heater having a flexible, thin-film graphite heater element includes a temperature sensing component that uses the heater element to sense temperature. The temperature sensing component includes a current sensor and a voltmeter circuit for determining a resistance and temperature of the heater element. A temperature control component associated with the heater element receives at least one set point value associated with the heater and controls the temperature of the heater element based on a comparison of at least one of the resistance and temperature of the heater element to the at least one set point value.