When your DeWalt nail gun isn’t firing, the most common culprits typically boil down to insufficient air pressure, a jammed firing mechanism, or a faulty nail collation. Don’t sweat it, this isn’t usually a sign of a total tool meltdown. More often than not, it’s a straightforward fix you can tackle yourself with a bit of troubleshooting. This guide is designed to cut through the noise, offering actionable steps to diagnose and resolve the issue, getting you back to framing or finishing without a costly trip to the service center. We’ll dive deep into common problems like air leaks, driver blade issues, depth adjustment woes, and even battery or fuel cell problems if you’re rocking a cordless model. Think of this as your personal DeWalt nail gun troubleshooting manual, packed with the practical advice you need to keep your projects on track.

Here’s a rundown of some top-tier products that can help you maintain, troubleshoot, and get your DeWalt nail gun firing like new:

DEWALT DWFP12231 Brad Nailer Kit
- Key Features: 18-gauge brad nailer, uses 5/8-inch to 2-inch brad nails, tool-free depth adjustment, jam release mechanism, lightweight design.
- Average Price: $100-$150
- Pros: Excellent for trim work and detailed projects, easy to maneuver, reliable DeWalt build quality, includes case and sample nails.
- Cons: Not suitable for heavy framing, requires an air compressor.
DEWALT DCN692B 20V MAX XR Brushless Dual Speed Framing Nailer
- Key Features: Cordless 20V MAX, brushless motor for extended runtime, dual speed settings for different nail lengths, sequential and bump fire modes, tool-free stall release and jam clearing.
- Average Price: $300-$400 tool only
- Pros: Freedom from hoses and compressors, powerful enough for framing, long battery life with XR batteries, quick to set up and use.
- Cons: Higher initial cost, heavier than pneumatic models, battery and charger sold separately.
DEWALT Air Compressor
- Key Features: Varies by model e.g., pancake, twin-stack, typically 150-200 PSI, oil-free pump, quick recovery time, compact design.
- Average Price: $150-$300
- Pros: Essential for pneumatic nailers, versatile for other air tools, durable construction.
- Cons: Can be noisy, requires electricity, adds bulk to your setup.
Pneumatic Tool Oil
- Key Features: Specifically formulated for air tools, prevents rust, lubricates internal components, extends tool life.
- Average Price: $5-$15
- Pros: Crucial for pneumatic nail gun maintenance, inexpensive, easy to apply.
- Cons: Not applicable for cordless models, must be used regularly.
DEWALT Brad Nails
- Key Features: Various gauges 18GA, 16GA, multiple lengths, galvanized or stainless steel options, precision collated.
- Average Price: $10-$30 per box
- Pros: Designed for optimal performance with DeWalt nailers, consistent quality, wide range of sizes.
- Cons: Can be more expensive than generic brands, specific gauge required for each nailer.
DEWALT 20V MAX XR 5.0Ah Battery
- Key Features: 20V MAX platform, 5.0 amp-hour capacity, XR Li-Ion technology for extended runtime and durability.
- Pros: Provides significant runtime for cordless nailers, compatible with a wide range of DeWalt 20V tools, reliable performance.
- Cons: Higher cost, adds weight to the tool.
Air Hose with Fittings
- Key Features: Various lengths and diameters e.g., 1/4-inch, 3/8-inch, flexible, durable materials rubber, PVC, hybrid, quick-connect fittings.
- Average Price: $20-$60
- Pros: Essential for pneumatic tools, provides reach and flexibility, available in various grades for different applications.
- Cons: Can kink if not stored properly, cheap hoses can leak or burst.

Table of Contents

Understanding the Fundamentals: How Nail Guns Work

Before you dive into troubleshooting, it’s helpful to grasp the basic mechanics of how a nail gun operates.

Whether it’s pneumatic air-powered or cordless battery/fuel cell, the core principle involves a driver blade propelling a nail from the magazine into the workpiece.

Pneumatic Nail Guns: The Air Powerhouse

Pneumatic nail guns rely on compressed air to function.

This air, supplied by an air compressor, is channeled into the gun’s firing mechanism.

Air Pressure: The compressor builds and maintains a specific PSI pounds per square inch that’s crucial for the tool to operate effectively. Too little air, and the nail won’t drive properly. too much, and you risk damage to the tool or the material. Most DeWalt pneumatic nailers operate best within a range of 70-120 PSI, depending on the model and the fastener size.
Trigger and Actuation: When you depress the trigger, compressed air is released, forcing a piston and driver blade forward. This blade strikes the nail head, driving it into the material.
Return Mechanism: After firing, a spring or residual air pressure retracts the driver blade, resetting the gun for the next shot.
Lubrication: Unlike cordless models, pneumatic nail guns require regular oiling. A few drops of Pneumatic Tool Oil in the air inlet before each use lubricate the internal O-rings and seals, preventing premature wear and maintaining consistent performance. Neglecting this is a common cause of sluggish operation or failure to fire.

Cordless Nail Guns: Battery and Fuel Cell Innovation

Cordless nail guns offer unparalleled portability by eliminating the need for an air compressor and hose.

They typically use a battery or a combination of battery and fuel cell.

Battery Power: Tools like the DEWALT DCN692B 20V MAX XR Brushless Dual Speed Framing Nailer use a powerful lithium-ion battery e.g., DEWALT 20V MAX XR 5.0Ah Battery to power a motor. This motor then drives a flywheel or piston mechanism to propel the nail.
Fuel Cell Gas Models: Some cordless nailers, often older models or specialized framing guns, use a small, disposable fuel cell in conjunction with a battery. The battery ignites the gas, creating a small explosion that drives the nail. These require both power sources to be functional.
Brushless Motors: Modern DeWalt cordless nailers often feature brushless motors, which are more efficient, provide longer runtime, and extend tool life compared to brushed motors. This translates to more nails per charge and less wear and tear.

Common Symptoms and Initial Diagnostics

When your DeWalt nail gun isn’t working, it’s presenting a symptom.

Your job is to be a detective and trace that symptom back to its root cause. Start with the simplest, most obvious checks.

The “No Fire” Scenario

This is the most frustrating symptom: you pull the trigger, and nothing happens. No click, no air, no nail. I Can Fall Asleep But Cant Stay Asleep

Check Power Source:
- Pneumatic: Is your air compressor on? Is it reaching the correct PSI? Is the Air Hose with Fittings securely connected to both the compressor and the tool? Are there any kinks in the hose? A kinked hose can severely restrict airflow.
- Cordless: Is the battery fully charged and properly seated? For fuel cell models, is the fuel cell new and correctly inserted? Even a partially depleted battery might not provide enough juice for the firing mechanism to cycle fully. Many DeWalt batteries have a charge indicator – always check it first.
Safety Mechanisms Engaged: Most nail guns have contact safety tips that must be depressed against the work surface before the trigger can be pulled. Ensure this tip is fully depressed. If it’s sticky or damaged, it might not be engaging.
Magazine and Nail Presence: Is there a strip of nails in the magazine? Are they the correct type and size for your gun e.g., DEWALT Brad Nails? If the magazine is empty or the nails are jammed, the gun won’t fire to prevent dry firing.

The “Fires But No Nail” Problem

The gun cycles, you hear the “pop” or “whoosh” of air, but no nail comes out.

Empty Magazine: This is the most common reason. Double-check that there are nails loaded.
Nail Jam: A nail might be stuck in the firing channel. We’ll cover clearing jams in detail later.
Driver Blade Issues: The driver blade might be broken, bent, or not fully extending. This often requires disassembling part of the nosepiece.
Low Air Pressure Pneumatic: If the air pressure is too low, the driver blade might move, but without enough force to fully propel the nail. Check your compressor’s gauge.
Weak Battery/Fuel Cell Cordless: Similar to low air pressure, a weak battery or fuel cell might initiate the firing sequence but lack the power to complete the drive.

The “Nail Not Fully Driven” Issue

The nail starts to go in, but it’s left proud of the surface.

Insufficient Air Pressure Pneumatic: This is the number one culprit. Increase your compressor’s PSI in small increments until the nails are consistently flush.
Depth Adjustment: All DeWalt nail guns have a depth adjustment feature. Make sure it’s set correctly for your material. Often, a quick turn of the depth adjustment dial or lever will fix this.
Incorrect Nail Length: Are you using the appropriate nail length for the material thickness? Trying to drive a 2-inch nail into a 1-inch board is asking for trouble.
Hard Material: Some materials, like dense hardwoods or engineered lumber, require more force. You might need to increase air pressure or adjust depth for these.
Worn Driver Blade: Over time, the driver blade can wear down, losing its ability to fully sink nails. This is a less common issue but can occur on older, heavily used tools.

Air Leaks Pneumatic Only

You hear a hiss of air, even when not firing.

Loose Fittings: Check all https://amazon.com/s?k=Air+Hose with Fittings connections. Tighten them if necessary.
Damaged O-Rings/Seals: Internal O-rings and seals can wear out or dry rot, causing air to escape. This usually requires a repair kit or professional servicing. Regular Pneumatic Tool Oil application significantly prolongs their life.
Cracked Housing: A rare but possible issue if the tool has been dropped or abused.

Comprehensive Troubleshooting Steps

Now that you’ve got a grasp of the symptoms, let’s get into the step-by-step solutions for your DeWalt nail gun. Remember, always disconnect power air hose or battery before performing any internal checks or maintenance. Safety first!

Step 1: Power Source Verification and Optimization

This is your first line of defense.

A surprising number of “tool failures” are simply power issues.

For Pneumatic Nail Guns:
- Compressor Check: Ensure your DEWALT Air Compressor is powered on and building pressure. Check its gauge. For framing, you’ll generally want 90-120 PSI at the tool. For brad or finish nailers, 70-90 PSI is often sufficient. Consult your specific nail gun’s manual for recommended PSI ranges.
- Air Hose Integrity: Inspect your Air Hose with Fittings for kinks, cuts, or leaks. A small leak might sound minor, but it can lead to significant pressure drops at the tool, especially during rapid firing. Replace any damaged sections or the entire hose if necessary.
- Fittings: Confirm quick-connect fittings are fully seated and not leaking. Sometimes, the internal O-ring on a quick-connect coupler can wear out, causing a persistent leak.
- Filter/Regulator: If you have an in-line air filter or regulator, ensure it’s not clogged or set too low. Regularly drain any accumulated moisture from your compressor tank.
For Cordless Nail Guns:

Perks Of Rowing Machine
- Battery Charge: The most obvious. Is your DEWALT 20V MAX XR 5.0Ah Battery fully charged? Don’t just look at the green light on the charger. some batteries have their own charge indicator. A partially charged battery might power the fan or light but lack the surge power needed for firing.
- Battery Seating: Ensure the battery is fully clicked into place. A loose connection can prevent proper power delivery.
- Battery Health: Over time, even DeWalt’s robust XR batteries can degrade. If you notice significantly reduced runtime or consistent power issues across multiple tools with the same battery, it might be time for a replacement.
- Fuel Cell if applicable: If your model uses a fuel cell, confirm it’s new, compatible with your gun, and correctly inserted. These have a finite life and cannot be refilled. Check the expiration date.

Step 2: Clearing Nail Jams

Jams are arguably the most common issue with any nail gun.

DeWalt tools are designed with jam-clearing mechanisms, making this relatively straightforward.

Safety First: ALWAYS disconnect the air hose or remove the battery before attempting to clear a jam. Nails are sharp, and firing mechanisms can be powerful.
Open the Jam Release Latch: Most DeWalt nail guns, including the DEWALT DWFP12231 Brad Nailer Kit and the DEWALT DCN692B 20V MAX XR Brushless Dual Speed Framing Nailer, have a tool-free jam release lever or latch near the nosepiece. Open this.
Locate and Remove the Jammed Nail: Look for a bent, partially driven, or misfed nail. Use needle-nose pliers or a small screwdriver to carefully pry it out. Avoid using excessive force which could damage the driver blade or nosepiece.
Inspect the Firing Channel: Once the nail is removed, visually inspect the firing channel for any debris, wood splinters, or other obstructions. Clean it thoroughly.
Check the Driver Blade: With the jam release open, you should be able to see the tip of the driver blade. Ensure it’s not bent, broken, or stuck in the extended position. If it is, this might indicate internal damage requiring professional service or part replacement.
Reload and Test: Close the jam release latch, reload the magazine with fresh DEWALT Brad Nails or appropriate framing nails, reconnect power, and test fire on a scrap piece of wood.

Step 3: Inspecting and Adjusting the Depth Setting

An incorrect depth setting can lead to nails not fully driving, or conversely, driving too deep and marring the surface.

Locate the Depth Adjustment: DeWalt nail guns feature a tool-free depth adjustment dial or lever, usually near the nosepiece.
Adjust for Material:
- Nails Proud: If nails are not going in all the way, increase the depth setting often indicated by a “+” or deeper setting.
- Nails Too Deep/Marring: If nails are sinking too far or leaving significant marks, decrease the depth setting.
Test on Scrap: Always test your depth adjustment on a scrap piece of the same material you’ll be working on. This allows you to fine-tune the setting without damaging your project.
Contact Trip: Ensure the contact trip safety tip is fully extending and retracting smoothly. If it’s sticky, clean it and apply a tiny drop of silicone lubricant never petroleum-based lubricants on plastic components.

Step 4: Lubrication and Maintenance Pneumatic Only

This is a critical, yet often overlooked, step for pneumatic tool longevity.

Daily Oiling: For pneumatic nail guns, add 3-5 drops of Pneumatic Tool Oil into the air inlet before each use, or at least at the beginning of each workday. This lubricates the internal O-rings, seals, and cylinder walls. Without oil, these components dry out, causing sluggish performance, air leaks, and eventual failure.
Air Line Filter/Lubricator Optional but Recommended: For heavy users, an in-line air filter/lubricator combo can be a must. The filter removes moisture and debris from the air, while the lubricator automatically adds a fine mist of oil to the airstream.
Cleanliness: Keep the tool exterior clean. Use a soft cloth to wipe away dust and debris. Avoid harsh solvents that could damage plastic components or seals.
Storage: Store your pneumatic nail gun in a dry, cool place, preferably in its case like the one included with the DEWALT DWFP12231 Brad Nailer Kit. Avoid storing it in humid environments where rust can form.

Step 5: Magazine and Nail Collation Issues

The quality and type of nails you use can significantly impact performance.

Correct Nail Type: Ensure you’re using the correct gauge and length of nails for your specific DeWalt nail gun. For example, an 18-gauge brad nailer like the DEWALT DWFP12231 Brad Nailer Kit cannot use 16-gauge finish nails or framing nails. Using the wrong size can cause jams, misfires, or damage to the gun.
Nail Collation Integrity:
- Broken Strips: If the plastic or paper collation holding the nails together is broken or damaged, individual nails can become misaligned in the magazine, leading to feeding issues and jams. Discard broken strips.
- Old or Rusty Nails: Old nails can become rusty or sticky, preventing smooth feeding. Always use fresh, clean nails.
- Loose Nails: Ensure the nails are properly seated in the magazine and feeding smoothly. If they’re loose, they might not align correctly with the driver blade.
Magazine Condition: Inspect the nail magazine for any bends, dents, or debris that could impede nail feeding. The follower that pushes the nails forward should move smoothly.

Step 6: Addressing Air Leaks Advanced Pneumatic Troubleshooting

If you hear a persistent hiss, even after checking external fittings, the leak is likely internal.

Locating Internal Leaks:
- Soapy Water Test: With the air hose connected and pressure applied but the gun disconnected from power and pointed safely away from you, spray a mixture of soapy water onto the gun’s housing and around seams. Bubbles will form at the leak point.
- Listen Closely: Sometimes you can pinpoint the leak by carefully listening.
Common Leak Points:
- Trigger Valve: A common culprit. Over time, the O-rings or seals within the trigger valve can wear, leading to a constant air leak.
- Main Cylinder O-Rings: These are critical for sealing the air chamber. Worn or dry O-rings here will cause air to bypass the piston, leading to weak firing or constant leaks.
- Head Gasket/O-Rings: The seals around the gun’s head where the cap is can also fail.
Repairing Internal Leaks:
- DIY for the mechanically inclined: Many manufacturers sell repair kits often called O-ring kits specific to your model. This involves disassembling the tool, replacing the worn O-rings, and reassembling. This requires patience, the right tools, and careful attention to exploded diagrams. Always follow the manufacturer’s instructions.
- Professional Service: If you’re not comfortable disassembling your nail gun, or if the leak is persistent after your attempts, it’s best to take it to an authorized DeWalt service center. Internal air leaks often require specialized knowledge to diagnose and repair correctly.

Step 7: When All Else Fails – Driver Blade and Internal Components

If you’ve gone through all the previous steps and your DeWalt nail gun is still acting up, the issue might be deeper, involving the driver blade or other internal components.

Driver Blade Inspection:
- Visually Inspect: Carefully open the nosepiece after disconnecting power and visually inspect the driver blade. It should be straight, free of chips or bends, and move smoothly.
- Wear: Over thousands of cycles, the tip of the driver blade can wear down, becoming less effective at driving nails flush.
- Broken Return Spring: If the driver blade doesn’t retract fully after a shot for pneumatic models, a broken return spring could be the cause.
Internal Damage:
- Bent Piston Rod: A rare but severe issue, often resulting from dropping the tool or severe jamming.
- Damaged Firing Pin: If the gun “fires” but you hear a distinct metallic clunk rather than a clean shot, the firing pin or its mechanism might be damaged.
Cordless-Specific Internal Checks Beyond Battery:
- Motor Health: If you hear the motor whirring but no nail is driven, there might be an issue with the internal drive mechanism flywheel or ram or a belt that transmits power.
- Electronic Issues: Cordless tools have sophisticated electronics. While rare, a faulty circuit board can lead to intermittent operation or complete failure.
When to Seek Professional Help:
- Persistent Issues: If you’ve tried everything and the problem persists, especially if it’s an internal air leak or a mechanical issue you can’t identify, it’s time for professional service.
- Warranty: If your DeWalt nail gun is still under warranty, attempts at DIY internal repairs might void it. Check your warranty terms before disassembling.
- Specialized Tools: Some repairs require specialized tools or knowledge of pneumatics/electronics that the average DIYer might not possess. DeWalt authorized service centers have the expertise and genuine replacement parts to get your tool running optimally again.

Remember, consistent maintenance, using the correct consumables DEWALT Brad Nails, and proper storage are your best defenses against downtime. By systematically troubleshooting, you can often diagnose and fix most DeWalt nail gun issues yourself, saving time and money.

Frequently Asked Questions

What are the most common reasons a DeWalt nail gun isn’t firing?

The most common reasons are insufficient air pressure pneumatic, a dead/low battery or empty fuel cell cordless, a nail jam, or a disengaged safety contact tip.

Why is my pneumatic DeWalt nail gun leaking air?

Air leaks in pneumatic DeWalt nail guns are usually due to loose fittings, worn-out internal O-rings or seals, or a damaged trigger valve. Regular oiling with Pneumatic Tool Oil can prevent O-rings from drying out.

Gaming Pc Under 1

How do I clear a jam in my DeWalt nail gun?

First, disconnect the air hose or remove the battery. Then, open the jam release latch usually near the nosepiece, carefully remove the bent or stuck nail with pliers, inspect the firing channel for debris, and then close the latch.

My DeWalt nail gun fires, but the nails don’t go all the way in. What’s wrong?

This is typically caused by insufficient air pressure pneumatic, an incorrect depth adjustment setting, or using the wrong nail length for the material. Adjust your compressor PSI or the tool’s depth dial.

How often should I oil my pneumatic DeWalt nail gun?

You should add 3-5 drops of Pneumatic Tool Oil into the air inlet before each use or at least at the beginning of each workday to lubricate internal components.

Can I use any brand of nails in my DeWalt nail gun?

While some generic nails may fit, it’s always recommended to use DEWALT Brad Nails or other high-quality, compatible nails from reputable brands. Using inferior or incorrect nails can lead to jams and tool damage.

Why is my cordless DeWalt nail gun not turning on?

Check if the DEWALT 20V MAX XR 5.0Ah Battery is fully charged and properly seated. If it uses a fuel cell, ensure it’s new and correctly inserted.

What PSI should I set my air compressor to for my DeWalt nail gun?

For most DeWalt pneumatic nail guns, a range of 70-120 PSI is common. Brad and finish nailers typically use 70-90 PSI, while framing nailers may require 90-120 PSI. Always consult your specific tool’s manual.

My DeWalt nail gun sounds like it’s firing, but no nail comes out.

This usually indicates an empty magazine, a nail jam, or a problem with the driver blade not fully extending or retracting.

How do I adjust the depth on my DeWalt nail gun?

Most DeWalt nail guns have a tool-free depth adjustment dial or lever near the nosepiece. Turn the dial or move the lever to increase or decrease the nail depth.

Is it normal for my DeWalt nail gun to get warm during use?

Yes, it’s normal for both pneumatic and especially cordless nail guns due to motor operation to get warm during extended use. Excessive heat, however, could indicate an issue. Best Reviews Guide

Can a worn driver blade cause issues with my DeWalt nail gun?

Yes, a worn or bent driver blade can prevent nails from being fully driven or cause misfires and jams. It may require replacement.

My DeWalt nail gun keeps misfiring. What’s causing this?

Misfires can be caused by low air pressure/weak battery, inconsistent nail collation, debris in the firing channel, or a sticky contact safety trip.

What kind of air hose should I use with my DeWalt pneumatic nail gun?

A good quality Air Hose with Fittings with a minimum 1/4-inch diameter or larger for framing and proper quick-connect fittings is recommended. Hybrid or rubber hoses are often more flexible and durable than PVC.

Why does my DeWalt nail gun double fire?

Double firing can occur due to excessively high air pressure, a faulty trigger, or a problem with the tool’s internal return mechanism not resetting quickly enough in bump fire mode.

My DeWalt nail gun won’t cycle after the first nail. What’s wrong?

This could be due to insufficient air recovery from the compressor, internal air leaks preventing proper piston return, or a sticking driver blade.

Can cold weather affect my DeWalt nail gun’s performance?

Yes, cold weather can affect both pneumatic and cordless nail guns. Air compressors might struggle, and O-rings in pneumatic tools can become stiff. Cordless batteries lose efficiency in extreme cold.

How do I maintain my cordless DeWalt nail gun?

For cordless models, focus on keeping the battery charged and in good health, ensuring the tool is clean and free of debris, and inspecting the nosepiece for wear. No oiling is required.

What does “stall release” mean on my DeWalt cordless nailer?

Stall release is a feature on some cordless nailers like the DEWALT DCN692B 20V MAX XR Brushless Dual Speed Framing Nailer that allows you to manually reset the driver blade if it gets stuck in the down position due to a jam or trying to drive into overly dense material.

Should I use an air filter with my pneumatic DeWalt nail gun?

Yes, an in-line air filter is highly recommended to remove moisture and debris from the compressed air, which can extend the life of your nail gun’s internal components and prevent rust.

My DeWalt nail gun’s contact trip is sticking. How do I fix it?

Clean the contact trip mechanism thoroughly to remove any accumulated sawdust or grime. A small amount of silicone lubricant can help it move smoothly. Avoid petroleum-based lubricants on plastic. Corded Massage Gun

Can a bent nail cause a persistent jam?

Yes, a single bent or improperly collated nail can lead to a cascade of jams and feeding issues. Always inspect your DEWALT Brad Nails or other nail strips before loading.

What are the signs of a worn-out O-ring in a pneumatic nail gun?

Signs include persistent air leaks, sluggish operation, or the gun not returning to its ready state quickly after firing.

How often should I check my air compressor for maintenance?

Regularly check your DEWALT Air Compressor for moisture in the tank drain it regularly, inspect air filters, and check for any unusual noises or pressure drops.

My DeWalt nail gun smells like burning. What should I do?

Immediately stop using the tool and disconnect power. A burning smell usually indicates an electrical issue in cordless models or extreme friction/overheating in pneumatic models. This often requires professional inspection.

Does a DeWalt nail gun require a break-in period?

While not strictly a “break-in” like an engine, it’s good practice to run a few strips of nails through a new gun on scrap material to ensure all mechanisms are functioning smoothly and to fine-tune depth settings.

Can I repair my DeWalt nail gun myself if it has internal issues?

For minor issues like jam clearing or O-ring replacement if you have the right kit and know-how, yes. However, for complex internal mechanical or electrical failures, it’s often best to seek professional service to avoid further damage or voiding warranties.

Why is my DeWalt nail gun not picking up nails from the magazine?

This could be due to improperly loaded nails, a damaged nail follower in the magazine, or debris obstructing the feeding mechanism.

What’s the benefit of a brushless motor in a cordless DeWalt nail gun?

Brushless motors, found in models like the DEWALT DCN692B 20V MAX XR Brushless Dual Speed Framing Nailer, are more efficient, provide longer runtime per charge, generate less heat, and typically have a longer lifespan compared to brushed motors.

My DeWalt nail gun won’t return to the top after firing.

This is often a sign of low air pressure pneumatic, internal air leaks preventing proper piston return, or a sticking/damaged driver blade and its return spring.

Treadmill Belt Catching

Dewalt Nail Gun Not Working