How Do I Prevent My Air Compressor from Overheating?

If you notice that your compressor is getting hot and bothered, there may be heating issues affecting your air compressors performance. Did you know that an overheating compressor is top of the pops for being the most common cause of compressor failure.

What causes my air compressor to overheat?

Internal and external factors can affect your unit and typically the air will become hot before it cools and reaches it's endpoint. Thus, ventilation of your air compressor is crucial to ensuring it's running. In a reciprocating air compressor, the air temperature will drop anywhere from  10 degrees celsius to 24 degrees celsius across the roughly six inches of travel between the discharge port and discharge line. If the temperature at the discharge port exceeds 148 degrees celsius, the refrigerant oil and adjacent mechanisms will suffer.

For the health of the air compressor, the temperature at the discharge line should never exceed 107 degrees celsius. Anything hotter at the discharge line would put the discharge port dangerously above the 148 degrees celsius level. If the temperature exceeds 176 degrees celsius in the discharge port, the heat could lead to imminent system failure.

How do I know if my air compressor is overheating?

If your compressor is too hot and it's behaving questionably, the likehood is that it may be from heating issues.

1. Compressor Doesn’t Turn On

If the compressor fails to start up as normal, there is definitely something wrong with the machine that could likely stem from a heating issue. If the compressor requires longer durations between usage cycles, the internal components are probably taking longer to cool down between each cycle. Likewise, if the machine stalls during startup and ultimately takes longer to get into full operational mode, this is probably due to heat-degraded internal mechanisms.

2. Circuit Breaker Tripping

In an air compressor, the current flow is regulated by the circuit breaker, which stops the flow when necessary as a protective measure for the performance and quality of the machine. If the circuit breaker acts irregularly and trips at seemingly random moments, this is a tell-tale sign that bigger problems lurk inside the air compressor.

3. Accelerated Wear

When an air compressor starts to wear down at an accelerated pace, there is likely a more serious matter at hand. For example, if the machine exhibits performance issues just weeks after it was last serviced, something was probably not evaluated properly, be it a problem with the oil, the vents, the refrigerant or the condenser parts. If the air compressor is long before its time and yet already failing to handle basic demands, there could easily be an issue related to overheating.

4.  Oil-related Issues

An air compressor could emit noises or smells indicating oil erosion. If you can hear faint creaking noises from the machine that seem out of the ordinary, it could be a matter of insufficiently lubricated internal parts. A more clear-cut indicator of oil trouble is when an air compressor smells of burnt oil. Either way, the issue should be inspected immediately, as insufficient lubrication and poor oil quality can have a domino effect on the internal mechanisms of an air compressor.

What can I do to prevent my air compressor from overheating

If you need to cool your compressor down, and work to prevent it from overheating, here's what you can do: 

1. Focus on Improving Ventilation

The first step toward reversing a heating issue with an air compressor should focus on the internal and surrounding ventilation. Have each vent inspected to ensure that they are sufficient for the demands of the machine. If not, you will need to have the vents replaced. Ask your maintenance person the proper ventilation dimensions for the size of your system and the operations at hand.

Also, consider the external factors of the machine itself. If the machine is in an area that is either too hot or not sufficiently ventilated, arrange space for the machine in a more suitable area. Make sure that this new placement allows plenty of breathing room for each of the vents.

2. Monitor the Compressor’s Oil Level and Filters Regularly

As with any motorized machine or vehicle, it is crucial to ensure that the oil in an air compressor is healthy. Check the oil level on a regular basis to ensure that there is enough to handle the demands of your operations. Also, check the viscosity to make sure that the oil has not been rendered too thin or watery — this would be a sign of excess heat within the system. Moreover, check the filters during each oil inspection.

3. Monitor Ventilation and Ducting

Even after you have modified the layout of your workspace to better ventilate the air compressor and the surrounding temperatures, inspect the ventilation and ducting on a regular basis. If dirt or dust accumulate along the vents, clean them out accordingly. Make sure that the ducting flows properly and is not crimped or punctured at any point of the system.

Even if, in all practicality, you found no reason to reposition the machine, the vents could still have issues if they don’t receive due attention. An air compressor that cannot properly vent is liable to have heating issues, regardless of where the machine is placed.

4. Keep the Compressor Parts Up-To-Date

Because needs change, the air compressor that you purchase one year might not be sufficient in its initial state as the demands of your operations evolve. If your operations have demanded increased amounts of air power since the time that you first bought the machine, consider updating your air compressor with more optimal components.

When to call Ash Air Services?

When you realise that your compressor is likely overheating, contact us immediately. The longer you wait the higher the risk that your compressor may continue to run too hot and the problem will have costly and time consuming consequences.

Have a chat to us, your friendly New Zealand Air Compressor Specialists, and our service person will analyse the issue, tell you if it involves damage to more than one part, or if insufficient oil is involved. With inspections performed by us, you can ensure reliable performance for your compressed air system, year in, year out! It is worth considering replacement parts for your compressor unit(s), as your compressor could work with higher efficiency if you changed out older and worn parts. This may be the most beneficial option for your system, creating ease of suction, compressing air and send out cooler, cleaner air to your air tools.

Have a chat and see how we can help you today:


Do you have an idea for our #expertcorner? Let us know!


Who we are and how Ash Air can help your business!

Ash Air has been around in New Zealand since 1979, and we’ve grown into a nationwide company with international support and a reputation for quality and reliability.We look after all things compressed air for your business!

Ash Air's range of Chicago Pneumatic, Alup, Pneumatech, and Quincy compressors are used extensively around the world in industries ranging from oil and gas to food, automotive and farming, and we bring you these world class compressors here in the land of the long white cloud.Our technicians are compressed air equipment experts and are dedicated to addressing customer needs. Supported by a 13 locations nationwide, Ash Air offers one of the widest selections of compressed air equipment and parts available today in New Zealand.

Reliability and Efficiency

With Ash Air compressors, you can count on reliability and high performance for even the most demanding applications. We focus our efforts on the following:


Talk to the team today:  CONTACT US CONTACT US



Air compressors come in many types, rotary screw, piston, scroll, reciprocating, some are oil-free and other air compressors require oil lubrication. Like many businesses, an efficient air compressor is at the heart of their operations. So, which type of compressor should you choose? What makes a compressor, like a rotary screw, unique? Here are some clear cut benefits of equipping your business with a rotary screw compressor.  


In the world of compressors, there are often significant and unutilized energy-saving possibilities including energy recovery, pressure reduction, leakage reduction and optimization of operations through correct choice of a control and regulation system as well as the choice of compressor size.We are going to take a look at some of the opportunities for minimizing the compressor’s operating costs. 


Liquid water in compressed-air systems can lead to rusted equipment and unresponsive controls. Anyone who uses compressed air will, at some point, find liquid water in the air distribution system. This can be anything from a nuisance to a serious problem, depending on the application. If water might corrode equipment or introduce bacteria, removing it is critical. 


Liquid water in compressed-air systems can lead to rusted equipment and unresponsive controls. Anyone who uses compressed air will, at some point, find liquid water in the air distribution system. This can be anything from a nuisance to a serious problem, depending on the application. If water might corrode equipment or introduce bacteria, removing it is critical. 


Whenever most people think about a compressor, they probably have a piston compressor in mind. You might already know there are two basic principles of air compression. One of those is the principle of displacement compression. There are a lot of compressor types that classify as a displacement compressor. The piston compressor is one of them, oil-lubricated or oil-free. 


Once you have the size and type of compressor figured out, one last question remains, should I go with an oil lubricated or oil-free air compressor. To not overcomplicate the answer, your choice should be based on the application and process that the compressed air will be utilized in.


Like all compressor types, rotary screw models do require periodic maintenance. Thanks to the simplicity of the internal components, maintenance is relatively easy on most rotary air compressors. As long as you stick to a rotary screw compressor maintenance schedule, you will likely be rewarded with many, many years of optimal productivity from your machine. 


Did you know, the biggest part of the air we breathe is nitrogen? Everyone needs oxygen to survive, however air is made up of 78% nitrogen, only 21% oxygen and tiny amounts of other gases. Although, the human body does not use this nitrogen, it is very helpful in various industrial applications. There is an unlimited source of nitrogen readily available, allowing you to achieve needed purity at a fraction of your current annual nitrogen cost. 


If you notice that your compressor is getting hot and bothered, there may be heating issues affecting your air compressors performance. Did you know that an overheating compressor is top of the pops for being the most common cause of compressor failure. 


A rotary-screw compressor is an air compressor that uses a rotary-type positive-displacement mechanism, typically used replace piston compressors where large volumes of high-pressure air are needed, either for large industrial applications or to operate high-power air tools. 


Have a look around and what do you see? What are you thinking about? Your next holiday to Queenstown maybe? You might go snowboarding with the kids or have some alone time at the Day Spa. Whatever holiday you choose, compressed air is involved in some way, without you even realising it!  


There are crucial reasons why you should service and maintain your compressor regularly, with the most common issues being piston failure caused by wear of components, increased friction, corrosion, reduced cooling, overheating bearings and components, clogging of air filters. 


Compressed air is all around us, from the air in a balloon to pumping up tires on your bicycle. In this article we will explain what compressed air is and how it is created. Whether you know it or not, compressed air is involved in every aspect of our lives, from the balloons at your birthday party to the air in the tires of our cars and bicycles. It was probably even used when making the phone, tablet or computer you’re viewing this on. 


One of the biggest challenges is to correctly size your new air compressor. Similarly to everything else, new compressors available on the market are more efficient and employ better technology, therefore you have to understand the application and usage to size the machine correctly. Choosing the wrong air compressor for your facility can lead to problems with production and or increased costs due to wasted energy. 


Once you have the size of the air compressor figured out, the next thing to do is to decide on the type of compresor you will need for your application - piston, rotary screw compressor etc. Let us take a look at two of the most popular options available. When choosing the right type of compressor, you should ask yourself the following questions:


​Which vacuum pump do I need? - this is one of the most frequent questions we receive and this is understandable, because there are number of technologies which can provide the same vacuum level and pumping speed. Here is quick advice on how to choose the best vacuum pump for your needs. 


You may be asking, why does my air compressor start, then stop? Allow us to take the guessing out of it. We understand your pain. We know that a compressor problem can quickly result in hours (if not days) of production downtime and loss of revenue. When your compressor continuously shuts off from on, we refer that as a short cycle. There are a few reasons that a short cycle may be happening with your compressor. 


Air compressor leaks are very common in all applications, but can be very costly and difficult to find. On average, 20-30% of the compressed air used in a manufacturing plant is wasted as leaked air. Finding and fixing these leaks can save your business thousands of wasted dollars a year. 


When installing a compressed air system into a business, people often look to PVC piping as an option to build a piping system because it is cheap, versatile and easy to install. However, using PVC pipe in any compressed air application is extremely dangerous and NOT recommended by multiple associations and manufacturers. 


Changing the oil and oil filters on your compressor is one of the most common routine maintenance tasks to perform to keep your compressor running efficiently. After you remove your old oil and oil filter, you may find yourself wondering, “Where do I dispose of these?”, or “Can I just throw them in the trash?”. Because oil is toxic and a pollutant, disposing of your old oil and filters is not as simple as just tossing them in the trash.Â