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This OEM combination gas valve is the factory-specified replacement for the Carrier PG8MAA036070ADJA 80% AFUE packaged gas unit. The gas valve is the critical component that controls the flow of natural gas or propane to the burners. It receives a 24V signal from the control board and opens in response to a verified ignition sequence. When the valve fails, the result is a complete loss of heat — the inducer and igniter may operate normally, but no gas reaches the burners, causing repeated ignition lockouts or a constant no-heat fault code.
Compatibility: Designed for Carrier model PG8MAA036070ADJA packaged gas/electric units. Always verify the OEM part number on your existing valve's label and confirm gas type (natural gas vs. LP) before ordering. Our HVAC parts specialists are available to confirm fitment before you buy — no guesswork required.