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Fenix FD45 Troubleshooting StepsUpdated 2 years ago

  • If the focus ring is too tight to turn, apply a small amount of oil lubrication under the ring. Typically once you turn the ring the first time it will loosen up.
  • Confirm that your batteries are good. Try using the battery in another device.
  • Confirm that the batteries are inserted into the light facing the correct directions. 2 batteries should go in positive (+) side toward the head (LED) and 2 should go in negative (-) side down, as indicated on the inside of the flashlight.
  • Confirm that there is only one o-ring on the light. The o-ring that comes in the box is a spare. The light already has an o-ring on it when you first remove it from the box. If you put on the spare o-ring, please remove it as this will prevent the light from making a full connection with the batteries.
  • Lubricate the o-ring using a small amount of petroleum jelly on the end of a cotton swab.
  • Click and hold the power switch for .5 seconds. A single click will not turn the light on, you must hold the button down.
  • The rotation ring can become very tight and may be difficult to turn after not being used for a while. However once you turn it the ring should "loosen up" again. 
  • Confirm that the tail piece is completely tight on the body of the flashlight.
  • If the light flashes twice when you press the side switch the light is in Lockout Mode. Click the side switch twice quickly (double-click) to deactivate Lockout and turn the light on.

After you have completed the above troubleshooting steps, if your light is still not working, please click one of the two links below to request a repair:

  • If you purchased this product directly through Fenix-Store.com over a year ago, please click here to fill out our Return Authorization form.
  • If you purchased this product from another store or a different Fenix distributor, please click here to fill out our Return Authorization form.
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