Diagnosing a bad Stanley door control board involves troubleshooting steps to identify common signs of control board failure. Here’s a step-by-step guide to help you determine if the control board in a Stanley automatic door system is functioning correctly or if it needs replacement:

1. **Check Power Supply:**
Start by ensuring the automatic door system receives a stable power supply. Verify that the power source, electrical outlet, and wiring are functioning correctly. A control board may not work properly if it’s not getting sufficient power.

2. **Inspect Wiring and Connections:**
Examine all wiring and connections related to the control board. Loose or damaged wiring, frayed cables, or disconnected components can affect the board’s performance. Make sure all connections are secure and in good condition.

3. **Review Control Settings:**
Access the control board settings and programming. Incorrect or misconfigured settings can lead to control board issues. Ensure that the settings align with the door’s intended operation and any safety requirements.

4. **Check for Error Codes:**
Many automatic door systems have diagnostic features that display error codes when there’s a problem with the control board. Refer to the user manual or control panel to identify error codes and their corresponding explanations. This can provide valuable information about the control board’s health.

5. **Test Control Buttons and Sensors:**
Verify that the control buttons and sensors connected to the control board function as intended. Test push-button switches, motion sensors, safety sensors, and other input devices to ensure they send accurate signals to the control board.

6. **Inspect LED Indicators:**
Many control boards have LED indicators that provide information about their status. Check these indicators for any unusual behavior. Blinking or steady lights can indicate different issues. Consult the user manual or manufacturer’s documentation for LED indicator meanings.

7. **Check for Burned Components:**
Physically inspect the control board for any signs of damage or burnt components. Burned-out capacitors, resistors, or other electronic components can indicate a malfunctioning control board. If you notice visible damage, the board may need replacement.

8. **Seek Professional Assistance:**
If you’ve gone through the above steps and suspect a control board issue but can’t pinpoint the problem, or if you lack the expertise to diagnose electronic components, it’s best to seek professional assistance. Contact a qualified technician or a Stanley customer support representative for further evaluation and potential control board replacement.

In summary, diagnosing a bad control board in a Stanley automatic door system involves a systematic approach that includes power supply checks, inspection of wiring and components, reviewing control settings, checking for error codes, testing input devices and sensors, inspecting LED indicators, and looking for visible damage on the board. If problems persist after troubleshooting, it’s advisable to consult a professional technician for further evaluation and control board replacement if needed.


Automatic Door Doctors is a commercial door company, based in the Denver Metropolitan area, that repairs and installs automatic and manual doors.

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