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Bosch Hvac 8733933939 Diagnostic Control Board

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Special Price $110.67 Regular Price $127.27
In stock
SKU
8733933939
Bosch HVAC 8733933939 Diagnostic Control Board is an electronic controller that is used to control the monitoring of the system and coordination of the operation of heat pump equipment. It operates by using integrated circuitry which interprets signals sent by temperature sensors, pressure switches and safety parts and uses this information to operate compressors, fan motors and protective operates when used in HVAC systems. The board is mounted within the equipment control compartment into which wiring harnesses are connected to the designated terminals and power connections are connected to the control circuit. The continuous signal processing allows diagnostics of the system, observation of the operating conditions, and control of the connected elements.
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HVAC Controls & Electrical, Control Boards & Modules
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Product Questions (2)
Customer Questions
What maintenance is required for the Bosch HVAC 8733933939 Diagnostic Control Board?

Inspect the control board periodically for loose connectors, corrosion, or signs of overheating. Clean dust and debris from the board using compressed air and ensure the enclosure remains dry. Proper maintenance helps accurate system diagnostics and fault detection. Always disconnect power before servicing.

What are common issues with the Bosch HVAC 8733933939 Diagnostic Control Board?

  • Malfunctioning circuits causing inaccurate system readings.
  • Loose or corroded wiring connections.
  • False or inconsistent error codes.
  • Inability to communicate with sensors or devices.
  • Intermittent system resets or unstable operation.

Installation Steps

Step 1: Turn off power to the HVAC system and allow the unit to discharge.

Step 2: Remove the access panel to expose the existing diagnostic control board.

Step 3: Disconnect all wiring and remove mounting screws from the old board.

Step 4: Install the new board, aligning it with mounting points.

Step 5: Reconnect all wiring according to the unit schematic.

Step 6: Replace the access panel, restore power, and test system operation.