When you pull the trigger air comes out near the trigger and no nail is fired.

It appears to be a known issue

FinishPro® 18Mg - Senco

https://www.senco.com > docs > manuals-and-parts-charts

PDF FinishPro® 18Mg. 18 Ga. Brad Nailer. NFD81UMG Revised Mar. 11, 2014 (Replaces ... Fire." B First, ? pull trigger, then. ? push safety element against work surface for operation each time ... ? Double Action et ? Restriction. Dans certaines ...

FAQs ' SENCO

https://www.senco.com > faqs

A Restrictive Trigger tool will reduce the possibility of double fire and may reduce the speed of operation compared to a Dual Action Trigger tool. Call Customer ...

SOLVED: Shooting two nails instead of one - Fixya

https://www.fixya.com > support > t3317376-shooting_...

Question about Senco FP18 FinishPro 18 - Gauge Brad Nailer, 5/8" - 2" ... I would double check the plunger to make sure its resetting after each fire. Helpful 0 ...

nailer double nailing - Fine Homebuilding

https://www.finehomebuilding.com > forum > nailer-do...

Oct. 25, 2003 - I have a brand new bostich framing nailer and it is constantly double nailing and getting jammed. ... consider the senco framer I recently saw packaged with an 18 gage stapler for only $199 at Lowes. ... You can make the best of nailers double fire. ... Podcast 331: PRO TALK With Cabinetmaker Ben Scott ...

Remove the head and lube the headvalve with white grease. If gun still does not fire and makes air noise at the trigger valve then orings within the trigger valve are worn. Replace the trigger valve or if you have a source for small orings, just replace the two orings on the metal stem (2mm x 1.5mm). Dewalt uses vinyl orings on the stem that fail. Replace with buna. Good luck

Check the safety trip make sure it is pushing back far enough. If it doesn't then it won't do anything. When it was fine just moments earlier.

Dewalt has two triggers available for their framing nailer. The black trigger (390746-00) is a bump style trigger. While holding the trigger, you will be able to fire a nail by pressing nose against work. This trigger is preferred by most framers because it is much faster. Gray trigger will only allow one nail to be fired. Bumping will not work with the gray trigger. With trigger released, you must place the nose against work then pull trigger to fire. To fire next round, you must release trigger, pull gun off the work, again place nose against work then press trigger. Check dewalt web site for recall information. Some dewalt framers have been recalled for faulty trigger. Good luck with your projects.

You could have a nail jammed. Remove the front assem. where the nails come out and see if somthings stuck like a nail.

Orings /other parts tend to stick when nailer is new. Dewalt uses some vinyl orings that have been causing premature failure. Be sure to add a few drops of oil when used. Too much oil is not good. Wrong oil will cause orings to swell and cause problems such as yours. Your nailer's firing valve can be reset by rapping the nailer against rubber surface such as a thick rugger mat or coiled rubber air hose. Remove airline and nails, being carefull not to damage the head, rap had against rubber mat and retest gun. If it did not reset rap against nose of gun and test. If no joy, you will most likely need to remove head and manually move cylinder up/down and /or check vinyl orings for failure. Before you try to reset the gun, make sure that the safety is pushing the firing pin all the way in. Air removed, look under the trigger as you push down on safey, if it does go all the way in try bump-firing the gun (for test have nails removed). Hold in trigger and quicky /firmly strike gun against rubber pad. Good luck

Not sure about Senco but most have latch you can open to expose firing mechanism. Nail sometimes gets jammed and will not allow driver to fire or if not nail push driver ****** all the way back into gun then see if gun will fire.

could be the wrong nails, could be a worn driver ( what hits the nails) could be a worn nose( what the nail comes out of) our local repair shop can check it out and repair the problem,,, pls rate ...tks

Porter cable makes a number of brad nailers (18 gauge) that very quickly suffer from the problem that you are having. You did not mention the model number of your gun but if it is one of these, (bn125a, bn200a, ns100a) kit # 60061 will fix the problem. It costs between 25 and 30 dollars. Google that part number or order from www.dewalt.com. Dewalt owns the porter cable brand. Before you order the kit, check that the driver blade is not bent and stuck. The driver should travel freely down the cylinder. When you install parts, use Danco silicone grease to lube (availabel at Lowes in the plumbing department) If your model # is different from those mentioned above, please email me and I will recommend a repair.

Where does the air leak out from? If it leaks from the trigger DeWalt makes a trigger valve assembly part # 641006-00 list 8.89 BUT if it leaks from other areas we have to look into it deeper. If it is just the trigger valve let me know and I will give you instructions how to remove and install the new one.