What to do if the screen shows 'Error Code 3'

It means the jump starter is at an extremely low or high temperature, which is outside the range of operating temperature.

Our device is designed to perform in a wide range of operating temperatures:

The Alpha 85S and Alpha 100 can operate from -40℉ to 113℉, while the Alpha 65 and Alpha 85 can operate from -4℉ to 113℉.

What happens and what to do if the temperature exceeds the operating temperature

1) At extremely high temperatures

If the temperature is too high, exceeding the highest operating temperature 113℉, “Error Code 3” will be displayed on the screen.

If the screen shows “Error Code 3,” please follow these 5 steps:

Step 1: Remove the clamps from the car battery.

Step 2: Leave your devices in a shady place and wait for 10 minutes until the “Error Code 3” message disappears automatically.

Step 3: Reconnect the clamps to the car battery correctly and the “READY” icon will appear on screen.

Step 4: Start the car engine.

Step 5: Remove the clamps from the car battery

2) At extremely low temperatures

Alpha 85S/100:

If the Alpha 85S/100 is at an extremely low temperature, the Pre-Heat Function will operate automatically and the “Pre-Heat” icon will appear on screen when the detected temperature is below the ideal operating temperature.

If the screen shows “Error Code 3,” please follow these 3 steps:

Step 1: Connect the clamps to the car battery correctly.

Step 2: The Pre-Heat Function will operate automatically and the icon will be displayed on screen when the detected temperature is below the ideal operating temperature.

Step 3: The “READY” icon appears on the screen after preheating, after which you can start your car engine.

Alpha 65 / 85:

Without the Pre-Heat Technology when the operating temperature is too low, the “Error Code 3” message will appear on the screen.

If the screen shows “Error Code 3,” please follow these 3 steps:

Step 1: Put it in a warmer environment and wait for returning to the operating temperature.

Step 2: Connect the clamps to the car battery correctly again.

Step 3: After the “READY” icon appears on screen, you can start your car engine.

If you still require assistance, please contact us:

If you have checked the connection, there is no Error Code on the screen, and you still can’t start your vehicle with our product at over 80% battery power, please contact our customer support at service@hulkman.com with the following information:

1. Order number
2. The serial number of your product (Where can I find the serial number?)
3. Your vehicle model
4. Any images or videos for proof of the issue

Our agent will help you troubleshoot your issues, with the guarantee of an exemplary experience.