Comstock Castle COM17005 Thermocouple 18\” 20-30mV 1980 Series
The Comstock Castle COM17005 thermocouple helps support safe and reliable operation by monitoring the presence of a pilot flame in compatible gas equipment. Measuring 18 inches in length and producing 20–30mV, this component works by generating a small electrical signal when heated by the pilot flame. That signal is used to keep the gas valve open during normal operation. If the flame goes out, the signal stops, allowing the gas supply to shut off as a safety measure. Designed for use with compatible 1980 Series equipment, this thermocouple helps maintain proper burner operation, supports safety functions, and contributes to dependable day-to-day equipment performance.