antique air compressor identification

Methods for Fixing Air Compressor Humming and Frequent Causes

For many professions and do-it-yourself undertakings, an air compressor is a crucial instrument. From nail guns to spray painters, it is utilized to power a wide variety of instruments and machinery. Nonetheless, it can be an irritating and perplexing issue when an air compressor begins to hum but doesn’t start. In this post, we’ll examine the typical root causes of this problem and offer some troubleshooting advice to help you get your air compressor working again.

5 Root Causes of the Air Compressor Humming Issue

Many things, from loose or damaged parts to low oil levels or electrical problems, might make an air compressor hum. You may take steps to address the issue and make sure that your air compressor keeps working efficiently and smoothly by taking the time to pinpoint the issue’s root cause.

  1. Lack of power or blown fuse
  2. clogged air filter
  3. Faulty pressure switch
  4. A broken or worn belt
  5. Leaky or damaged unloader valve

Lack of power or blown fuse

When an air compressor is buzzing but not starting, the first thing to look for is a power outage or blown fuse. It’s crucial to make sure the compressor is plugged in correctly and that electricity is flowing to the outlet. The fuse has probably blown if the outlet has electricity, but the compressor still won’t turn on. In this instance, replacing the fuse is necessary before your compressor will turn on.

Clogged air filter

Another common cause of an air compressor humming but not starting is a clogged air filter. The air filter is in charge of keeping dirt and debris out of the compressor’s internal components. If the filter becomes clogged and restricts airflow, the compressor may struggle to start. To resolve this issue, you must clean or replace the air filter.

Pressure switch failure

The pressure switch is another component that can cause an air compressor to hum but not start. The pressure switch is in charge of turning the on and off the compressor based on the air pressure in the tank. If the pressure switch is broken, the compressor may not start. Remove the cover to inspect the pressure switch and look for signs of wear or damage. If the switch is broken, it must be replaced.

A broken or worn belt

A worn-out or broken belt is another component that might make an air compressor hum but not start. Power is transferred from the motor to the compressor’s pump through the belt. The compressor may not start if the belt is damaged or worn out. You must take off the cover to inspect the belt for any signs of wear or damage. The belt must be replaced if it is worn out or damaged.

Leaky or damaged unloader valve

Last but not least, an air compressor may hum but not start due to a leaking or defective unloader valve. When not in operation, the unloader valve is in charge of releasing pressure from the compressor’s pump. The unloader valve might prevent the compressor from running if it is leaking or broken. You must take off the cover to check the unloader valve and look for any wear or damage. The unloader valve must be changed if it is leaking or damaged.

Steps for Troubleshooting

  • Make sure the power is on and change the fuse if necessary.
  • Replace or clean the air filter.
  • Examine the pressure switch, and if necessary, replace it.
  • Check the belt’s wear and replace it as necessary.
  • Upon inspection, replace the unloader valve if necessary.

Maintenance in advance

To keep your air compressor in good working order and avoid issues like buzzing but not starting, routine maintenance is essential. You should routinely inspect and replace filters and belts to keep your compressor in good working order. The interior parts of the compressor should also be kept clear of debris and clean.

The necessity of routine maintenance to avoid issues

  • Recommendations for caring for air compressors include inspecting and replacing filters and belts regularly.
  • Maintaining the cleanliness and absence of debris in the compressor’s interior parts
  • Check the compressor’s parts for wear and tear regularly.
  • Booking an annual inspection with a qualified technician

Final Words

Several issues, including a lack of power or a blown fuse, a clogged air filter, a malfunctioning pressure switch, a broken or worn belt, or a leaking or damaged unloader valve, might lead to a humming but non-starting air compressor. You may quickly find the source of the problem and remedy it by inspecting these parts. The longevity and problem-free operation of your air compressor depend heavily on regular maintenance.