This article explains how to troubleshoot the W07 High Temperature Battery Operation Protection warning on an Aventon eBike.

Use this article if your bike:

• Shows a W07 warning code
• Loses power or assistance during hot conditions
• Displays a high temperature battery warning
• Stops operating normally after heavy riding or heat exposure

If you are unsure of your Aventon model, please confirm your model before continuing.

Stop troubleshooting immediately if anything looks unsafe, damaged, swollen, overheated, or smells burnt.

Before You Start

Please prepare the following:

• Order number
• Aventon model
• Photo or video of the W07 warning code
• Photo of the battery area
• When the issue first appeared
• Whether the bike powers on
• Whether the display turns on
• Whether the motor engages
• Whether the issue happened after heavy riding, climbing, hot weather exposure, transport, storage, water exposure, crash, impact, modification, or third-party repair
• Photos of visible damage

Safety Warnings

• Do not continue riding if the battery appears damaged, swollen, overheating, or leaking.
• Do not continue using the bike if there is a burning smell, smoke, or visible electrical damage.
• Do not open sealed electrical components.
• Do not work on wiring while the bike is powered on or charging.
• Stop and contact support if you are unsure.

What This Warning Means

The W07 High Temperature Battery Operation Protection warning means the battery temperature is too high for normal operation.

The bike may temporarily reduce or stop power output to help protect the battery.

Possible Causes

Possible causes include:

• Ambient temperature is too high
• Damaged battery
• The eBike has been overloaded for an extended period of time

Troubleshooting Steps

Step 1 – Allow the Battery to Cool Down

Stop riding the bike before continuing.

Remove the battery if it is externally removable.

Place the battery in an environment between:

• -4°F to 113°F
• -20°C to 45°C

Leave the battery in this environment for 2 hours.

After 2 hours:

• Reinstall the battery
• Restart the bike
• Check whether the W07 warning remains

If yes – The W07 warning still appears

Continue to Step 2.

If no – The warning clears

The issue was likely caused by temporary battery overheating.

Continue monitoring the bike during riding.

If the issue clears

Follow the preventative measures listed below during future riding.

If the issue remains

Continue to Step 2.

Step 2 – Check Whether the Warning Persists

After cooling the battery and restarting the bike, check whether:

• The bike powers on normally
• The display operates normally
• The motor engages correctly
• The W07 warning returns

If yes – The W07 warning still appears

The issue may involve the battery system.

Please contact our support team with the photos/videos listed below so we can review the next step.

If no – The warning no longer appears

The issue was likely caused by temporary overheating during heavy riding or hot conditions.

Continue monitoring the bike during use.

Step 3 – Reduce Riding Load During Heavy Riding

Check whether the issue happened:

• During steep climbing
• During prolonged riding
• During hot weather
• While carrying heavy loads

If yes

To help prevent overheating:

• Reduce speed during climbs
• Pedal during climbs instead of relying fully on motor assistance
• Take short breaks during prolonged climbs
• Ensure the bike remains within recommended load limits

If no

The battery system may require further inspection.

Please contact support.

If the issue remains

Please contact support.

Step 4 – Inspect the Battery for Visible Damage

Inspect the battery for:

• Swelling
• Cracks
• Water exposure
• Burning smell
• Overheating
• Physical damage

If yes – Visible damage is found

Stop using the battery immediately.

Do not continue riding or charging the bike.

Please contact our support team with photos/videos of the battery.

If no – No visible damage is found

Restart the bike and check whether the W07 warning returns.

If the issue remains

The battery system may require further inspection.

Please contact support.

When To Contact Support

Please contact support if:

• The W07 warning remains after completing these checks
• The bike does not power on
• The motor does not engage
• The battery shows visible damage or swelling
• The bike loses power repeatedly during normal riding
• The bike has been exposed to water, crash, impact, transport damage, modification, or third-party repair
• You are unsure how to safely complete a step

If the issue remains after these steps, please contact our support team and include the photos/videos listed below.

What To Send Support

Please send:

• Order number
• Aventon model
• Photo/video of the W07 warning code
• Photo of the battery area
• Photos of visible damage
• Confirmation of whether the bike powers on
• Confirmation of whether the display turns on
• Confirmation of whether the motor engages
• Confirmation of the operating temperature conditions
• Confirmation of whether the issue happened during heavy riding, climbing, or hot weather
• Confirmation of whether the issue happened after water exposure, crash, impact, modification, or third-party repair
• Confirmation of the troubleshooting steps already completed

Important Safety Notes

• Do not continue riding if the W07 warning remains.
• Do not use the bike if the battery is overheating, swollen, smoking, leaking, or visibly damaged.
• Do not open the battery, controller, or sealed electrical components.
• Do not force connectors.
• Do not work on wiring while the bike is powered on or connected to the charger.
• Contact support if you are unsure.