senoid plunger not retracting

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Answer
The EL94/95 Inpact solenoid is different than the EL33A/35A/98/99 solenoid. The part for the Inpact solenoid is 113189.  
As of 1/16/2013, the 113189-00 EL INPACT SOLENOID/PLUNGER ASSY is no longer available.
The threaded bushing on the solenoid plunger requires 8-9 threads showing to operate correctly.
Changing the plunger assembly on the AL-Series requires disassembling the chassis.  Refer to Plunger Assembly Instructions for guidance.
Bad dogging hook on the dogging assembly could cause the 33A/35A and 98/99 exit device latch bolt not to retract completely.
One of the following items may cause the EL1490 device to retract then release: Incorrect power supply - Verify you have the PS873-2/4TD or PS914-2RS/4RL power supply. Problems with wire gauge...
You may have a defective motor bracket, defective base plate or vertical rod could be out of adjustment.
If your Von Duprin EL (solenoid) device pulls and releases quickly instead of holding the latch retracted, please check all of the items below.In most cases, one or more of these solutions will r...
  Pushing on the push  bar or activating the EL/QEL or the trim on Von Duprin XP98/99 exit device does not retract the latch, it releases the latch only. Door must be pushed or pulled when device o...
The Von Duprin 6000 series electric strike has a 12 or 24VDC solenoid with plunger, spring and impact washer as shown 6000 solenoid Make sure the solenoid spring and impact washer are not missin...
The following could cause the Von Duprin CX solenoid ( devices shipped prior to 8-24-2015) to pull and drop and sound the alarm with solid LED light. Wrong power supply, requires Von Duprin ...
The following could cause the Chexit solenoid ( devices shipped prior to 8-24-2015) pulls in then drop out with no alarm. Mechanical adjustment such as vertical rods. Disconnect t...
If mechanism cover plate causes the EL solenoid to drop when slid over the solenoid, the solenoid plunger requires adjustment.  You must lengthen the rod by turning the hex nut in front of the plun...
A design change occurred in 2001 to address a locking/unlocking issue with the discontinued D73 lever locks.  This included modifying the cam and plug, spindle and using a different plung...
One of the following items may cause the EL1690 device to retract then release: Incorrect power supply - Verify you have the PS873-2/4TD or PS914-2RS/4RL power supply. Problems with wire gauge...
The 98/99 rim and vertical rod exit devices are shipped with NL drive screw to function as a Night Latch. To convert the device to Class Room, remove the NL Drive Screw on 98/99 center case ass...
After installing a classroom deadbolt, there is potential for the thumbturn to project the bolt only, get stuck in one position, or move both directions but not move the bolt.  These are caused fro...
Latch retraction issues at time of installation could be caused by incorrect handing of the lock chassis.  Move the driver to one of the following positions as indicated below:  
The Von Duprin 7500 mortise lock body ships in the NL mode.  Either the function of 7500 lock body has not been changed to the Classroom function or the NL Drive screw is not all the way down. Step...
  Tips for changing the function: The NL Drive screw will not be visible when lock body is set to Classroom function There is locktite on the screw that makes it seem like its turned down enou...
If the 912L was shipped after February 28,  2011, Check the installation instructions, step 3 to be sure all parts are installed on the trim correctly, even if the trim was received in th...
Most likely need to length the top rod so latch can engage it's internal latch retention state. See 2390 Instructions for adjusting rod lengths.
ND-series locks manufactured on or after January 30, 2017 will ship with an improved spring cage and matching lever design. The design features are noted below. Because of this change, there a...
NOTE: ND locks manufactured on or after January 30, 2017 will no longer make use of the soft durometer spacer. The improved spring cage and matching lever eliminates the need for this spacer.Schlag...
The solenoids are different.  The current standard EL solenoid and mounting bracket is a one piece unit. The bracket is crimped into the front of the solenoid. This solenoid and plunger has no mech...
If the NL screw on the 99 device has been removed the Trilogy lock will not retract the latch.
The L9466 Store/Utility Room lock can provide this functionality. Operation: Latchbolt retracted by knob/lever either side. Deadbolt thrown or retracted by key from either side. When the deadbolt ...
Using the key from the pull side of the door does not retract the latch bolt on a rim or vertical rod chexit device.
CX98/9975 mortise devices will retract the latch bolt when the key is used on the pull side of the door.
Incorrect timing of the lock can cause the outside lever to retract the latch when raised up.  See instructions here (Step 16 and 17) to time a T351, T381, T561, and T571.  Also applies to the same...
To verify the timing on a T561, function test the outside lever after locking it.  To lock the key should only rotate 180 degrees (Not 360 degrees as Schlage does) A properly timed lock will n...
The latch bolt on an XP98/99 exit device does not retract. The latch bolt will release and pivot out of the way when push bar is depressed or out side trim is activated.
The Von Duprin Chexit device does not have electric latch retraction feature.
The following could cause the QEL device to retract and release repeatedly: If this is a vertical rod type device, the vertical rods could be adjusted too short. Check rods for dead locking, ...
The Von Duprin 6000 series electric strike can be converted by ordering the appropriate kits below.  Kits include the solenoid, plunger, spring, and washer. 6000 Series solenoid Kit 12VDC -...
Only the chassis components are modified for thicker door applications, the lever and spindle assemblies remain intact.  The following parts may be modified depending on the function of the lock ...
Conversion kits are available to convert many popular functions.Conversion kits manufactured on or after January 30, 2017 will have the new enhanced ND spring cage, lever, plunger and buttonCo...
For all available ND Series Conversion Kit part numbers, click here.
 HD-EL (Hex Dogging Electric Latch Retraction) solenoid and plunger can be replaced with standard EL solenoid and plunger on non fire rated exit devices, but this should not be used on a daily basi...
The ND40 outside emergency button and the ND44 outside emergency turn button can disengage from the lever and fall out when they are not assembled properly.Click here for emergency button...
 If the button and plunger or emergency cylinder are damaged they can be ordered separately.  Part numbers are below.  Emergency Button and Plunger (ND40) - N123-034Em...
To convert the AL44 to an AL40 you can replace the outside plunger unit in the chassis or order the AL40 chassis.  Replacing the plunger unit is more difficult and time consuming and would not be r...
- AD Series and CO series products require that the Night Latch (NL) screw is installed in the exit device.  Be sure this screw is installed- Exit hardware and strike must be properly mounted ...
After rotating  the key to unlock the lock, you must return the key to its normal position to remove it. 
Swapping out the following parts of an ND50 will convert it to an ND53: Swap N123-028 Push button plunger for  N123-017, Push and Turn button plunger Swap N523-000, Push button for N523-001 Pus...
In early 2013 the ND85 plunger assembly was improved to prevent accidental rotation of the inside button.  The previous design could allow someone to unintentionally rotate the button and unknowing...
The ND lead lined option is specified by XN12-307 and consists of two 1/16” thick rose plates, a single 1/8” button/cylinder plate and a 1/16” latch sleeve.