5 Warning Signs Your Generator Needs Professional Repair

Your generator sits ready for months—but will it work when you need it? Watch for these warning signs.

1. Hard Starting or Won't Start

Symptoms: Extended cranking, multiple attempts to start, or complete failure to start during weekly exercise.

Possible causes:

• Weak or dead battery
• Fuel delivery issues
• Spark plug failure
• Control board problems

Urgency: High. A generator that won't start is useless during an outage.

2. Unusual Noises

Symptoms: Knocking, pinging, grinding, or squealing sounds during operation.

Possible causes:

• Low oil level causing engine damage
• Worn bearings
• Loose components
• Exhaust system issues

Urgency: High. Strange noises often indicate imminent failure.

3. Visible Leaks

Symptoms: Oil, coolant, or fuel puddles under or around the generator.

Possible causes:

• Degraded gaskets or seals
• Loose fittings
• Cracked fuel lines
• Coolant system failure

Urgency: Medium-High. Fuel leaks are fire hazards. Oil leaks lead to engine damage.

4. Error Codes or Warning Lights

Symptoms: Fault codes on display, warning lights, or alerts in your monitoring app.

Common codes:

• Low oil pressure
• Overcrank (failed to start)
• Overspeed/underspeed
• High temperature
• Low battery

Urgency: Varies. Some codes are minor; others indicate serious problems. Don't ignore them.

5. Excessive Fuel Consumption or Smoke

Symptoms: Black smoke, blue smoke, or noticeably higher fuel usage than normal.

Possible causes:

• Black smoke: Rich fuel mixture, air filter clogged
• Blue smoke: Oil burning, worn piston rings
• White smoke: Coolant leak into combustion chamber

Urgency: Medium-High. These symptoms indicate engine problems that will worsen.

Don't Wait for an Outage

The worst time to discover generator problems is during a power outage. If you notice any of these signs, schedule service now—before you need your backup power.