Reznor 121275 Stack Flue Block Manual Reset Eco L275F Limit Switch
SKU: 121275
$90.00
Stock:
1 unit
Description
- The Reznor 121275 Stack Flue Block Manual Reset Eco L275F Limit Switch is an essential, high-precision safety sensor designed to monitor exhausting integrity within commercial and industrial gas-fired unit heaters.
- This heavy-duty thermal cutout is engineered to open instantly at exactly 275°F if a downstream ventilation obstruction, blocked flue stack, or structural exhaust backflow occurs.
- Featuring a strict manual reset mechanism, this switch locks out furnace operations to prevent automatic equipment restarts, ensuring a professional HVAC service technician inspects the vent pipe pathways before the heating cycle can safely resume.
- Perfect for commercial property maintenance managers and mechanical pipe fitters, this genuine Reznor OEM safety block ensures absolute compliance with regional exhaust codes while maintaining original factory safety certs across F-series heater lines.
Specifications
Manufacturer / Brand
Reznor (Thomas & Betts / Nortek Global HVAC)
Product Line / Series
Vent Safety Switch Component Series
Manufacturer Part Number / SKU
121275
UPC
290123512125
ASIN
B003U4DH9Y
Switch Trip Temperature
Opens at exactly 275°F (135°C)
Electrical Interface
Standard 1/4" male spade terminal connectors
Item Weight
136 grams (4.8 oz)
Product Dimensions
101.6 mm x 45.7 mm x 25.4 mm (4.00" x 1.80" x 1.00")












