There are a few things that could cause the driver to fail, to retract. Which tool are you using? I’ll need that info in order to give you the best instructions.
In the meantime, I have a few recommendations for what you can check:
1) Air Pressure. If the air pressure on the tool is too low, the driver blade won’t be able to retract. Has something changed with your setup?
2) Debris. With the tool disconnected from the air, remove the front nose plate (where the nails shoot from) by either lifting the lever and removing it (if you have a B17P.763 or 17P.32 Omer nailer), or removing the two screws at the front that hold it on if you have a pinner or brad nailer. Check the area that the driver blade moves up and down in, to see if there is any debris jamming it.
I can give you more specific advice if you tell me which tool you have. If you would rather not mess with your tool, you can ship it to us and I will fix it for you. We’ll charge for the parts and $10.50 per half-hour of labor. Something like this shouldn’t take more than 30 minutes. Here is our ship to: Utility Composites Inc 888 County Road 108, Hutto, TX 78634 Attn: Tool Repairs