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This OEM dual pressure switch assembly is the factory-specified replacement for the Carrier PG9YAB036060AAAA gas furnace. The dual pressure switch monitors negative pressure created by the inducer draft motor — proving that the venting system is operating correctly before allowing the ignition sequence to proceed. If either switch fails to close (or fails open), the furnace control board will lock out the heating cycle entirely, resulting in a no-heat condition. Common symptoms include the inducer motor running but the furnace never advancing to ignition, or a fault code indicating a pressure switch error on the control board.
Compatibility: Fits Carrier model PG9YAB036060AAAA gas furnace. OEM part HK06NA014 has been superseded by Carrier part HK06MB024 — this listing ships the current factory-approved replacement assembly. Verify your existing switch's W.C. ratings on the data plate or existing switch label before ordering. Questions? Our HVAC parts specialists confirm fitment before you buy.