Milwaukee M18 Inflator Problems : 5 Common Issues (Explained)

The Milwaukee M18 inflator is a reliable and efficient tool designed to quickly inflate tires, this makes it a valuable asset for any vehicle owner. With its compact size and cordless operation, the Milwaukee M18 inflator can offer convenience and ease of use. However, like any other useful tool, it may encounter certain problems that can hinder its performance. Today we will explore the most common problems that users face with the Milwaukee M18 inflator and provide effective solutions to overcome these problems.

Table of Contents

What Is The Milwaukee M18 Inflator?

The Milwaukee M18 inflator is a portable air compressor which is specifically designed for inflating tires. It is part of the Milwaukee M18 line which is known for its high-quality power tools. The Milwaukee M18 inflator operates on the Milwaukee M18 REDLITHIUM battery system that ensures consistent power output for efficient tire inflation. With its compact and lightweight design, it is easy to carry and store in your vehicle, making it a convenient solution for your emergency tire inflation needs.

Milwaukee M18 Inflator Problems

1. Low Pressure Output Problem

One of the most common problems users encounter with the Milwaukee M18 inflator is low pressure output. This can be frustrating when you need to inflate your tires quickly. There are a few possible causes for this problem like;

  • Air leakage
  • Inaccurate pressure readings

Troubleshooting The Low Pressure Output Problem

  • Be sure to check the connections between the hose, chuck and tire valve, and ensure they are properly secured and not damaged.
  • If you notice any leaks, tighten or replace the affected parts. It is also important to inspect the hose for any cracks or punctures that may cause air leakage.
  • If you notice inconsistent or inaccurate pressure readings then you need to calibrate the gauge by following the instructions in the inflator’s user manual.
  • If the problem persists then you should immediately contact Milwaukee customer support for further assistance.

2. Not Starting Problem

Another problem you may experience whilst using the Milwaukee M18 inflator is one where it doesn’t start completely which is not great since you need it to power up for you to effectively inflate tires and other things. Reasons for this problem include;

  • A faulty or damaged battery
  • Low air pressure
  • Off setting

Troubleshooting The Not Starting Problem

  • The Milwaukee M18 inflator is REDLITHIUM battery powered, which means it is rechargeable, so you may only need to recharge the battery. However, overtime this battery may lose its overall capacity. Be sure to replace it with a new one then.
  • Make sure the inflator has enough air pressure before attempting to use it to inflate things.
  • Also make sure that you have selected the correct settings by referring to the Milwaukee M18 inflator’s user manual to avoid this problem.

3. Not Stopping Problem

The Milwaukee M18 inflator should stop once the air pressure reaches a certain point however when this doesn’t happen it can be a big problem for the things you’re inflating. Such a problem is usually because of;

  • A faulty pressure switch
  • A faulty release valve

Troubleshooting The Not Stopping Problem

  • If the pressure switch on your Milwaukee M18 inflator is faulty or damaged then it will need to be replaced.
  • If you have a faulty release valve then you should stop using the inflator by turning it off and make sure to replace it with a new one before using it again.

4. No Air Pressure Problem

If you connect your Milwaukee M18 inflator’s hose to the tire or thing you want to inflate but notice there is absolutely no air pressure coming out then it may be due to;

  • A faulty or drained battery
  • Regulatory pressure is zero

Troubleshooting The No Air Pressure Problem

  • Before using the Milwaukee M18 inflator, make sure that the REDLITHIUM battery is fully charged. You can also check the battery’s overall health by using a voltmeter to measure the potential difference.
  • Also make sure that the regulatory pressure on the inflator is not set to zero. Therefore you have to adjust the pressure in accordance to the thing you will be inflating.

5. Overheating And Power Problems

Other common problems that you may encounter with the Milwaukee M18 inflator is overheating and power problems, one of each of these problems can occur because of the other and thus causing the Milwaukee M18 inflator’s performance to drastically drop. They are caused by;

  • A faulty battery
  • Faulty battery connections
  • Prolonged usage or overusage

Troubleshooting The Overheating And Power Problems

  • If the battery charge is low then it can affect the pressure output. Make sure your battery is fully charged before using the Milwaukee inflator.
  • But if the above problem persists then you need to check the battery contacts and clean them if necessary. A faulty battery may need to be replaced.
  • Continuous or prolonged use of the Milwaukee M18 inflator can cause it to overheat so you will have to allow the inflator to cool down before using it again.
  • You should also avoid using the Milwaukee M18 inflator for extended periods without giving it a chance to cool down.

How To Prevent Problems With The Milwaukee M18 Inflator

  • After each use of the Milwaukee M18 inflator make sure you clean the exterior of the inflator using a soft cloth or brush. Remove any dirt, debris, or dust that may have accumulated during operation. This will prevent any potential damage to the inflator’s components.
  • Be sure to regularly apply a small amount of lubricant to the chuck and hose connections to ensure smooth operation and prevent air leakage. Also be sure to use a lubricant suitable for pneumatic tools.
  • Keep your Milwaukee M18 inflator’s battery clean and free from dirt or moisture. Regularly check the battery contacts and clean them if necessary.
  • You should avoid exposing the battery to extreme temperatures or storing it in damp conditions.
  • Be sure to store your Milwaukee M18 inflator in a clean and dry environment. Avoid storing it near chemicals, solvents or corrosive substances that may damage the inflator’s components. It is also recommended to remove the battery when not in use for an extended period.

Can I Use The Milwaukee M18 Inflator For Other Inflatables?

Yes, the Milwaukee M18 inflator can be used for other inflatables such as sports balls, inflatable mattresses, and bicycle tires. However, it is important to refer to the manufacturer’s guidelines for the recommended pressure range of the specific inflatable item.

Is The Milwaukee M18 Inflator Compatible With Other Milwaukee M18 Batteries?

Yes, the Milwaukee M18 inflator is compatible with all Milwaukee M18 REDLITHIUM batteries. This allows you to interchange the battery with other Milwaukee M18 tools thus providing you with flexibility and convenience.


The Milwaukee M18 inflator is a valuable tool for quick and efficient tire inflation and by understanding how to troubleshoot most of its common problems you can ensure its optimal performance and longevity. Remember to check for air leakage, address power issues, calibrate the pressure gauge and prevent overheating. Also do regular maintenance and proper storage to contribute to the inflator’s overall durability. With these troubleshooting tips and maintenance techniques, you can be sure to rely on your Milwaukee M18 inflator whenever you need to inflate your tires or other inflatable things.