Typical cause is low voltage - but can also be a bent driver or something jammed in the nail track.
Is this a finish nailer or framing nailer?
SOURCE: Paslode framing nailer intermittent firing
OK lets start from the top, gas full, but what is the expiration date, it is located on the bottom of the fuel cell and if out of date can cause a problem. Second when was the last time the tool was taken apart and completely cleaned and serviced with new orings and lube? Lastly look at the nails are they traveling thru the magazine freely? Let me know and I will try and help further
SOURCE: D51844 Won't Fire Nails
The Dewalt D51844 uses a full round head 20 degree nail. Sometimes the generic brand nails are not made exactly to the stated degree. They do this so their nails will work on a variety of nailers. Best to check the nails angle in relation to the angle of your nailer. Place a strip of nails on the outside of the rail. Align the heads of the nails to a convenient straight edge on the rail then check that the head and shaft of the first nail is aligned with the barrel. If the lower part of the nail projects out further than the head, then the driver will miss the head. If the head of the first nail appears close enough to barrell for the driver to hit it then place a new strip of nails into the mag and slide the pusher foward. Fire one nail, if success, remove the nails from the mag and check if the plastic holding the nails together is projecting in front of the first nail. Sometimes the plastic is not right, too stiff, and will not let the next nail align with the barrell. If the next nail appears ready and slides forward then the driver may not be going all the way up after shot. Check by inserting a metal rod into barrell and push driver up till it stops. If the driver is in the uppermost position, then most likely brand of nails. Use Dewalt nail. Good Luck
SOURCE: I have only used my Dewalt DC616KA Finish Nailer
if its even close to being under warranty your local dewalt service center might be agreeable to taking care of it for you if you ask nicely :)
the driver blade may be bent/broken or one of the multiple plastic pieces inside may have cracked or chipped, keeping the driver from travelling the full distance. the blade fits into the "profile" which may be somehow damaged or worn to the point of malfunction. there are two bumpers that fit on the profile and these may have slipped, cracked, etc.
even if none of these parts are so damaged as to be defective, even a tiny piece chipped off could be impeding the function of the assembly. but my guess is that's where your problem is.
SOURCE: impulse gun wont fire and fan doesnt run
could be a bent probe not allowing full travel of the safety , fan motor, loose wire, or circuit assembly. If you are handy with tools, remove the battery and fuel cell. remove the 4 screws holding the cover on top of the cylinder assembly and down where the saety is remove the 2 screws there also. gently pull the cylinder off the tool. when you have apart check toe condition of the Oring on the top plate where the fan motor is. Now reinsert the battery and you will see a rocker switch towards the top, depress it and the fan motor should come on. if not try and depress the trigger switch and again the fan motor should come on. If neither start looking for loose or broken wires, if you find none then I would guess the terminal board would be bad. you can also remove the handle halves and look for a loose connection at the board itself, they sometimes wiggled loose where it plugs in. Good luck and let me know.
SOURCE: My dewalt cordless finish nail
there is a lock in rear right side (small black rubber thing) us push it back!
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