Air compressor symptoms

Won't start, won't build tank pressure and won't start with a full air tank are common air compressor failures. When your air compressor doesn't work, use our symptoms and troubleshooting advice to find the cause of the failure. Order air compressor parts by keying your model number in to the model finder and selecting the replacement parts you need. Follow the step-by-step instructions in the repair guides to install parts and restore your air compressor to working order.

air compressor

Symptoms common to all air compressors

Choose a symptom to see related air compressor repairs.

Main causes: lack of electrical power, check valve failure, bad pressure switch
Main causes: rusted air tank, loose air tube fitting connections, bad check valve, leaky safety valve, bad tank drain valve
Main causes: bad safety valve, pressure switch failure
Main cause: faulty output air pressure regulator
Main causes: tank drain valve open or leaking air, leaky air tank, bad safety valve, worn pump seals, bad pump valve plate
Main cause: bad air tank pressure gauge
Main causes: loose air tube fitting connections, bad check valve, faulty safety valve, damaged or corroded air tank, bad air pump
Repair guides common to all air compressors

These step-by-step repair guides will help you safely fix what’s broken on your air compressor.

May 1, 2015
By Lyle Weischwill
How to rebuild an air compressor pump

If the air compressor won't fill the tank with compressed air, rebuild the pump using these steps in about 45 minutes.

Repair difficulty
Time required
 45 minutes or less
How to replace an air compressor pressure switch

You can replace a broken air compressor pressure switch in about 45 minutes.

Repair difficulty
Time required
 45 minutes or less
How to replace an air compressor check valve

You can replace a defective air compressor check valve in about 10 minutes.

Repair difficulty
Time required
 15 minutes or less
Articles and videos common to all air compressors

Use the advice and tips in these articles and videos to get the most out of your air compressor.

May 1, 2015
Air compressor common questions
By Sears PartsDirect staff

These answers to common questions can help you make the most of your air compressor.

April 24, 2015
How to reduce air compressor noise
By Sears PartsDirect staff

Find out how to reduce air compressor noise.

April 22, 2015
The unseen dangers of air compressors
By Sears PartsDirect staff

Learn about the possible dangers associated with using an air compressor and how you can reduce the risks of property damage and personal injury.