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The genuine OEM Lennox 43L41 is a CR28K6E-PFV-875 reciprocating compressor rated at 26,100 BTUH for 208/230V single-phase equipment running R-407C refrigerant. This piston-driven compressor draws in low-pressure refrigerant vapor and compresses it to high pressure, driving the cooling cycle in your Lennox condensing unit. Reciprocating designs are robust and well-suited to the operating conditions of R-407C retrofit and legacy systems.
Common failure symptoms: Watch for a unit that energizes but produces no cooling, knocking or rattling from worn internal components, frequent breaker trips, excessive noise on startup, or thermal overload cycling. Loss of compression and grounded windings typically indicate the compressor has reached the end of its service life.
Why OEM matters: The 43L41 is built to Lennox's precise capacity, oil-charge, and electrical specifications for R-407C applications. Using a factory-authentic compressor ensures correct refrigerant compatibility, protects system efficiency, and maintains warranty coverage. Non-OEM alternatives can introduce oil-mismatch and capacity issues that shorten equipment life. Install with proper system evacuation, a new filter drier, and accurate charging.