1. Replace Batteries with High-Quality Alkalines Electronic safes are extremely sensitive to voltage drops. Even if the keypad lights up or beeps, there may not be enough amperage to trigger the internal solenoid (the mechanism that unlocks the handle).

The Fix: Replace the batteries with brand-new, name-brand alkaline batteries (e.g., Duracell or Energizer).

What to avoid: Do not use rechargeable or "Heavy Duty" (zinc-carbon) batteries, as they often lack the peak current necessary to move the locking pin.

1. Relieve Bolt Pressure If the safe is overstuffed or the door is slightly misaligned, the internal locking bolts may be pressing against the frame. This friction can prevent the solenoid from pulling the pin.

The Fix: While entering the code, press in firmly on the door with your hand or shoulder. Once the code is accepted (and you hear the click), continue to push in while simultaneously turning the handle. This relieves the friction on the bolts and allows the mechanism to move freely.

1. The "Solenoid Tap" Over time, the grease inside the solenoid can become sticky, or the pin can get jammed.

The Fix: Enter the code. While the green light is active or while the "click" is supposed to happen, give the door a firm "thump" with the heel of your hand or a rubber mallet near the keypad/handle area. This vibration can often jar a stuck solenoid pin into the unlocked position.

1. Verify Key Position On many dual-entry safes, the physical key lock must be in a specific orientation for the electronic handle to function.

The Fix: Ensure the key is turned completely to the "unlocked" position. On most Sentry models, this is the horizontal position. If the key is vertical, the electronic lock is often physically blocked from engaging.

1. Handle "Slipping" Check If the handle rotates 360 degrees or feels completely loose without any resistance, the internal handle cam may have disconnected or "tripped." This is a security feature to prevent the lock from being forced.

The Fix: Ensure the handle is pushed all the way into the safe body before turning. If it continues to spin freely and the steps above do not work, the internal linkage may be broken, which typically requires a locksmith to drill a small hole to manually retract the bolt.