If your air compressor is turning on and off more frequently than it should, it’s short-cycling — and it’s one of the most damaging things that can happen to your equipment.
Every motor start creates a large current surge. Frequent starts accumulate stress on motor windings and starting components, leading to premature motor failure. For businesses across Metro Vancouver and the Fraser Valley, catching this early is critical.
If water has built up in the receiver tank (from infrequent draining), effective storage capacity drops. The compressor builds pressure fast, shuts off, and restarts almost immediately. Fix: Drain the tank fully and drain it regularly.
The check valve stops compressed air from bleeding back through the compressor head when the unit shuts off. A failed check valve causes rapid pressure drop and premature restart. Fix: Check valve replacement — a relatively inexpensive repair.
Even moderate leaks cause the compressor to cycle frequently, especially during low-demand periods. Fix: Leak detection and repair.
If the gap between cut-in and cut-out pressure is too small, the compressor cycles more often than it should. Fix: A qualified technician can adjust the pressure switch differential.
If your operation has grown, your compressor may never fully unload — cycling under constant load. Fix: System assessment and possible upgrade.
When short-cycling symptoms appear, Motion Air Compressors diagnoses the root cause on-site — not over the phone. We carry commonly needed parts on our service vehicles, so many issues are resolved in a single visit. We serve the entire Lower Mainland, Fraser Valley, and BC.
How many times per hour should an air compressor cycle?
This varies by compressor size and system design, but as a rough guide, most commercial compressors should not start more than 4–6 times per hour under normal demand. Frequent starts — more than that — indicate a problem worth investigating.
Will short-cycling damage my compressor?
Yes, over time. Each motor start creates a large current surge that stresses motor windings and starting components. Repeated short-cycling accumulates this stress and can lead to motor failure — one of the most expensive compressor repairs.
Is short-cycling dangerous?
Not immediately, but it indicates a problem that will worsen. The most serious safety concern is if rapid cycling is caused by a failed pressure switch — in that case, the safety relief valve becomes the last protection against overpressure. Don’t ignore it.
Ready to get started? Contact Motion Air Compressors today — we come to you across Metro Vancouver, the Fraser Valley, Whistler, Vancouver Island, and throughout BC.
