Top 7 Most Common Candela Laser Errors — and How to Fix Them

Top 7 Most Common Candela Laser Errors — and How to Fix Them

Candela laser systems, such as GentleLASE, GentleMAX Pro, and GentleYAG, are widely used in clinics for their reliable performance and consistent results. But even reliable systems can develop issues over time.
Knowing the most frequent Candela errors helps prevent downtime and costly repairs. — can help you minimize downtime, reduce repair costs, and maintain consistent treatment results.
Here’s a quick look at what causes these issues and how to solve them with genuine parts.

1. Flash Lamp Error or Low Energy Output

When the laser pulse becomes weak or inconsistent, it typically indicates that the flash lamp or optics require attention.
Why does it happen:
  • The flash lamp is nearing its end of life.
  • The optics or protective window are burnt, cloudy, or dirty.
How to fix it:
  • Check the total lamp hours and replace the flash lamp if it is nearing its usage limit.
  • Clean or replace protective windows and optics
  • Use genuine Candela flash lamps to maintain consistent performance.

2. “No Energy” or “Misfire” Error

If your laser isn’t working properly, the delivery system or fiber optic cable may be damaged.
Why does it happen:
  • Fiber cable bent, cracked, or burned inside.
  • Delivery system misalignment
How to fix it:
  • Inspect the fiber for any visible damage.
  • Replace damaged optical fiber or delivery system.
  • Handle fibers gently and avoid tight bends to prevent future damage.
Using authentic Candela optical fibers ensures safe, consistent laser energy delivery during every treatment.

3. Water Flow or Cooling System Alert

The cooling system keeps your laser from overheating during use. This warning typically indicates a coolant blockage or low coolant flow.
How to fix it:
  • Check and refill the coolant level.
  • Clean or replace water filters
  • Inspect the pump and flow sensor for wear or blockage.
Never ignore a cooling alert — it protects your laser head and flash lamp from permanent damage.

4. Error 14 or Calibration Failure

When the system fails to calibrate, it’s usually due to unstable voltage or internal sensor faults.
How to fix it:
  • Use a power stabilizer to maintain a steady voltage.
  • Replace sensor cables or power supply modules if the problem continues.
  • Schedule calibration checks regularly to prevent recurrence.

5. Handpiece Trigger Not Working

A non-responsive handpiece trigger can completely halt treatments.
How to fix it:
  • Test the handpiece on another compatible unit.
  • Replace the trigger button or switch cable if faulty.
  • Avoid using worn-out buttons to prevent electrical faults.

6. System Stuck in Standby Mode

If your laser won’t exit standby mode, it could be due to a communication issue between the main boards.
How to fix it:
  • Restart and run diagnostics.
  • Replace the main board or CPU card if necessary.
  • Have a certified engineer inspect the system before swapping parts

7. Overheating or Automatic Shutdown

Overheating is one of the most common problems in older Candela models.
How to fix it:
  • Clean fans, air vents, and filters regularly
  • Replace faulty cooling fans or temperature sensors.
  • Keep your treatment room well-ventilated
Proper cooling prevents severe internal damage and extends the lifespan of your Candela laser.
Preventive Maintenance Tips for Candela Lasers
Consistent care is the key to preventing these common issues.
Here’s how to keep your system performing at its best:
  • Replace flash lamps, optics, and filters on schedule.
  • Maintain coolant levels and replace filters regularly.
  • Use genuine Candela consumables for every replacement.
  • Run diagnostic checks monthly to catch minor issues early.
Routine servicing not only improves performance but also helps you maintain patient safety and device longevity.
Where to Buy Genuine Candela Laser Spare Parts
When it’s time to replace critical parts, always choose authentic components specifically designed for your model.
At Lasez.com, you’ll find:
  • Original Candela spare parts, optics, flash lamps, and fibers
  • Verified quality trusted by technicians and clinics worldwide
  • Fast global delivery and responsive customer support
Keep your Candela GentleMAX Pro, GentleLASE, or GentleYAG performing like new — with genuine parts that protect your investment.
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