Guide
Why will my air compressor not start?
Most often the tank is still above cut-in pressure, the power or breaker is off, the pressure switch or capacitor has failed, or the motor's thermal protection has tripped. Check the simple things first, then call for repair.
By Everest Hydro Pneumatic Solutions, Pimpri-Chinchwad, Pune. Updated .
Check first
Is there power at the socket and is the breaker on?
Is the tank still full? The compressor starts only when pressure falls below cut-in.
Has the motor overheated? Many motors have thermal protection. Let it cool for 30 minutes.
Common faults
Pressure switch: contacts worn or stuck.
Capacitor or starter fault on single phase motors: the motor hums but does not turn.
Unloader valve stuck: the motor tries to start against full pressure.
Low voltage at the site, often with long, thin extension cables.
Stop and call
If you smell burning, see sparks, or the breaker trips again, switch off and call for repair.
Questions.
- My compressor hums but does not start. Why?
- Often a failed capacitor, a stuck unloader valve, or low voltage. Switch off to protect the motor and get it checked.
- Can you repair it at my site?
- Yes. Everest offers on-site repair. Call or WhatsApp +91 88558 20105 with the model and the problem.