DeWalt D51257 has been lightly used for home projects but it stopped working. When trigger is pulled, only air is coming out (through the trigger area) but no nail is fired. Should I replace the trigger valve? Cylinder and o-rings looks ok. Thanks for any advice.
I had this issue on a Makita siding nailer. 1 week old, was working perfectly the day before. Checked that the piston wasn’t stuck, opened it to see if residue was affecting the o-ring; everything was fine. In frustration, I held the trigger down while pressing the nozzle against the material. After about 5 seconds the gun finally engaged. Working perfectly again.