Causes of Partial Headlamp Lens Melting and How to Prevent It
Partial melting of headlamp lenses can occur due to the following reasons:
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Obstruction by Foreign Objects: If foreign objects, such as a cloth used to protect the lens during installation, block the light when the headlamp is turned on, it can cause localized overheating and lead to lens melting. Therefore, always inspect and remove any potential obstructions before turning on the headlights.
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Voltage Irregularities: Faults in the vehicle's alternator or electrical system can lead to abnormal battery output, either too high or too low. This can not only disrupt the functioning of the air conditioning system but also cause halogen bulbs to generate excessive heat. Vehicles equipped with projector headlights are particularly susceptible to high-temperature lens melting due to their focused light output. If this occurs, it’s recommended to consult a repair shop immediately to inspect components like the transformer and address any electrical system issues scientifically.
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Incompatible Bulbs or Improper Modifications: Using bulbs that do not conform to the manufacturer’s specifications or making improper modifications can produce excessive heat or alter the light beam’s distribution, potentially damaging the lens.
It's important to note that such damage is typically not covered under headlamp warranties. All factory-produced headlamps undergo rigorous testing to withstand normal high temperatures and meet regulatory standards, but these tests do not account for abnormal overheating scenarios.
LED and HID bulbs often have built-in voltage regulation, making them less prone to this issue. However, halogen bulb users should exercise extra caution to avoid these situations.
We’ve encountered similar cases in the past, so please take this matter seriously to ensure the longevity of your headlamps.