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If the closed-circuit reading is below 100mV
Is the 669941R compatible with all Nordyne cabinets
While designed for standard HVAC operations
Built to withstand high combustion chamber temperatures
Its rugged construction makes it well suited for continuous-duty applications requiring dependable operation under elevated temperatures
Lennox 46K91 Heat Exchanger Freon If the closed-circuit reading isThe Lennox 46K91 Heat Exchanger is a genuine OEM replacement part engineered specifically for high efficiency Lennox furnaces. As a factory authorized Lennox 46K9101 assembly, this component facilitates critical thermal transfer between combustion gases and the supply air stream, ensuring the structural integrity of the combustion chamber. For technicians performing gas furnace secondary heat exchanger repair, this part provides the exact physical
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