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the 78H40 and 78H4001 are functionally and physically identical
Smith burner assemblies
this gasket is the correct specification
you ensure electrical compatibility with the existing control board and transformer
cracked vacuum ports
Carrier LH680003 Pilot Assembly 322838-753 the 78H40 and 78H4001 areThe Carrier LH680003 Pilot Assembly is a critical OEM replacement component designed for high reliability intermittent pilot ignition in specific Carrier, Bryant, and Payne gas fired furnaces and water heaters. As a veteran grade three wire pilot assembly, this unit integrates both the ignition source and the flame sensing mechanism required to prove the pilot flame before the main burner gas valve is authorized to open. In these legacy systems, the
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