SIT 820 Nova Millivolt Valve Troubleshooting

By Fireplace Choice October 28, 2026 | Gas Valve Millivolt SIT SIT 820 Nova Standing Pilot Thermocouple Thermopile Troubleshooting | 0 comments

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...