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Duotone terrace — saffron brief on the left, garden-folded ledger on the right.
Key Benefits Automatic Reset Logic: Eliminates the need for manual intervention by cycling the circuit back to closed once temperatures drop to 170°F
The SM115-4QAI is the manufacturer code
The unit features an automatic reset and a -30°F to 80°F range
Maintaining clean
protecting the heat exchanger from gas buildup if power is interrupted
Carrier 331930-751 Ignitor Kit 328140-751 Key Benefits Automatic Reset Logic:The Carrier 331930 751 Ignitor Kit is a professional grade silicon nitride furnace ignitor designed to replace traditional silicon carbide components in 33. 5 inch mid efficiency gas furnaces. As a genuine OEM replacement part, this 120V hot surface ignition (HSI) assembly provides superior thermal shock resistance and accelerated heat up times, ensuring consistent combustion in Carrier, Bryant, and Payne systems. This technical upgrade kit includes