How to Test a Fireplace Thermocouple and Thermopile (Millivolt Readings)

By Fireplace Choice October 28, 2026 | gas fireplace millivolt multimeter pilot light testing thermocouple thermopile troubleshooting | 0 comments

A standing pilot (millivolt) gas fireplace runs on power made by its own pilot flame. The thermocouple holds the gas valve's safety magnet open so the pilot stays lit, and the thermopile powers the valve that lights the main burner when you flip the wall switch or press the remote....