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- The Reznor® 123974 is a genuine OEM fan switch (Model: F135-30F) that regulates the blower fan cycle on gas-fired unit heaters and duct furnaces. It ensures the blower activates only when the plenum heats up and shuts off once it cools down to prevent cold air drafts.
REZNOR® Fan Control, 135 deg F
- Use with Size 25, 200, 300, 400 Model F and FE heater
- ManufacturerNORTEK GLOBAL HVACManufacturer #RZ123974Temperature Rating135 deg F
