generator diagnostic
Generator starts but makes no power
A guided diagnosis for a generator that runs but does not deliver usable electrical output.
generator
Does the engine start and continue running normally?
This diagnostic is for a running generator that does not deliver usable power.
Before you begin
Shut the equipment down before inspecting it. Never bypass a safety switch, touch energized generator outlets, or inspect a moving blade, chain, auger, or pump.
Common questions
Why does my generator run but produce no electricity?
Start with the output breaker, GFCI outlets, extension cord, and connected load. If those pass, the failure may be in excitation, the voltage regulator, brushes, windings, or inverter electronics.
Is it safe to test a generator with a multimeter?
Only if you already understand live electrical testing and the manufacturer procedure. Stop immediately for exposed wiring, burning smells, or unstable voltage.
Is a no-power generator worth repairing?
Breaker and regulator repairs often are. Winding, generator-head, or inverter-board failures can approach replacement cost, so get a written diagnosis first.