DIY Repair of a used Air Compressor with electrical issues

I bought this air compressor used for €30.
The motor produces visible sparks during startup and sometimes trips the circuit breaker.
This video shows how I diagnosed and fixed this air compressor defect caused by excessive contact arcing inside the motor.
The compressor uses a single-phase induction motor with a start capacitor, run capacitor, and a centrifugal switch.
During startup, high inrush current causes sparking at the centrifugal switch contacts. In this video, I open the motor, inspect the switch, analyze the arcing, and explain, why it looks broken but may not be when sparking is normal and when it indicates a real defect how to fix the problem instead of replacing the motor whether the compressor is safe to keep using.

If you are searching for:

air compressor defect
air compressor sparks on startup
air compressor trips breaker
how to fix air compressor motor
electric motor repair

…this video is for you.

Topics covered:

defective air compressor diagnosis
air compressor motor repair
how to fix a single-phase motor
start capacitor vs run capacitor
centrifugal switch contact arcing
electrical motor troubleshooting

DIY compressor repair

repair instead of replacement
00:00 What the previous owner reported
00:18 Sparks during startup
00:37 Centrifugal switch and contact inspection
02:00 Motor type and why there is a switch
02:45 Capacitor measurements
03:27 testing with new capacitors
04:18 Fitting new capacitor
06:00 Reassembly
11:00 New issues and upcoming video
12 :30 Final test and conclusion