Order before 3PM CST — ships same day.
Standard delivery 2-5 business days. Express options at checkout.
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This OEM combination gas valve is the factory-specified replacement for the Carrier YAC1840YAC501K packaged unit. The gas valve is the critical component that controls the flow of gas to the burners — receiving a 24V signal from the control board, opening the valve, and delivering metered gas for ignition. When it fails, the most common symptoms are no heat, a system that locks out after repeated ignition attempts, or a unit that will not fire despite a functioning igniter and flame sensor.
Compatibility: Designed and factory-matched for Carrier model YAC1840YAC501K. Always verify OEM part number EF680015 against your unit's data plate and existing valve before ordering. Our fitment team is available to confirm compatibility before you buy — ships same day when ordered before 3PM EST.