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York S1-6421651 2-Stage Circuit Board

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Special Price $976.93 Regular Price $1,084.39
In stock
SKU
S1-6421651
The York S1-6421651 2-Stage Circuit Board is an essential component of York’s HVAC systems. It is a printed circuit board used to regulate two-stage ON/OFF heating or cooling systems. This board is responsible for the coordination of different system elements, and the time at which they are functioning. The circuit board is designed to accurately regulate the functioning of the stages in the system to provide a comfortable temperature indoors while using less energy. This also plays a role in the maximum durability of York HVAC systems.
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HVAC Controls & Electrical, Control Boards & Modules
Manufacturer:
https://www.partshnc.com/media/catalog/product/s/1/s1-6421651.jpg

Specifications

  • Type: Circuit Board
  • Number of Stages: 2
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Product Questions (2)
Customer Questions
What maintenance is required for the York S1-6421651 Circuit Board?

Regularly inspect the circuit board for dust, dirt, or corrosion. Ensure all connections are secure and check for signs of overheating. Maintenance helps Keep proper stage control, prevents electrical faults, and ensures accurate system operation.

What are common issues with the York S1-6421651 Circuit Board?

  • Faulty or intermittent electrical connections.
  • Overheating or component failure.
  • Erratic operation of heating/cooling stages.
  • Damaged traces or burnt components.

Installation Steps

Step 1: Turn off all power to the HVAC unit and verify with a voltage tester.

Step 2: Remove the access panel to locate the existing circuit board.

Step 3: Take a photo or label all wire connections before disconnecting them.

Step 4: Carefully remove the old circuit board from its mounting.

Step 5: Install the new board in the same position and reconnect all wires.

Step 6: Replace the access panel, restore power, and test both stages for proper operation.