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- The Reznor® 121275 is an OEM manual-reset blocked vent switch (or stack flue block sensor) designed for Reznor gas-fired and waste oil unit heaters. It acts as a crucial safety device, shutting down the heater by opening its circuit when flue temperatures exceed 275 deg F.
REZNOR® Flame Rollout Limit Switch, For Use With: Model F and B Gas-Fired Gravity Vented Unit Heater, 275 deg F
- Opens at 275 deg F to stop operation if the vent stack gets too hot due to poor airflow.
- Suitable For Use WithModel F and B Gas-Fired Gravity Vented Unit HeaterManufacturerNORTEK GLOBAL HVACManufacturer #RZ121275Temperature Rating275 deg F