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SIT 820 Nova Millivolt Valve Troubleshooting
The SIT 820 Nova mV is a millivolt gas valve for standing pilot gas fireplaces, log sets and space heaters. The pilot burns all the time and its thermopile powers the valve, so the fireplace works without house power. Your fireplace's parts list may give the valve under the fireplace...
Robertshaw and Dexen Standing Pilot Valve Troubleshooting
Robertshaw and Dexen make low-capacity millivolt gas valves for standing pilot fireplaces and gas logs. Empire, for example, fits a Dexen millivolt valve to its VFSR vent-free log burners, and we carry Dexen / Robertshaw replacement valves under several part numbers (listed below). The pilot's thermopile powers the valve, so...
How to Test a Fireplace Thermocouple and Thermopile (Millivolt Readings)
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....
Millivolt vs Electronic Ignition Gas Fireplaces: What's the Difference?
If you own a gas fireplace or you're shopping for replacement parts, you've probably encountered the terms "millivolt" and "electronic ignition." Understanding which type of ignition system your fireplace uses is essential for ordering the correct parts, troubleshooting problems, and understanding how your fireplace operates.This guide explains both systems in...
Gas Fireplace Pilot Light Won't Stay Lit: Causes and Fixes
On a standing pilot (millivolt) gas fireplace or gas log set, the pilot stays lit only while the pilot flame heats the thermocouple enough to hold the gas valve's safety magnet open. When the pilot lights while you hold the knob in but goes out when you let go, Heat...
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SIT 820 Nova Millivolt Valve Troubleshooting
Oct 28, 2026 -
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