When the power goes out, your home standby generator becomes more than a machine – it’s your lifeline. It keeps the lights on, your fridge cold, your AC humming, and your family safe. But here’s the truth most homeowners miss: even the most reliable backup power system will falter if you ignore the early warning signs. And small issues? They don’t stay small for long. Left unchecked, they can turn into costly repairs or worse, leave you powerless in the middle of a storm.
The good news is most issues reveal themselves early if you know what to look for. Here are the red flags to watch for and the quick fixes that can keep your generator dependable, efficient, and always ready for the next outage.
Delayed or Difficult Startup
Warning sign: Your generator hesitates to start, stalls or fails on the first try.
Possible cause: Stale fuel, worn spark plugs or a weak battery.
Quick Fix:
If your generator struggles at startup, it’s telling you it needs attention before the next blackout.
Test the battery-check connections and clean terminals
Replace spark plugs
Refill with fresh, clean fuel (never let gas sit for months)
Unusual Noises
Warning sign: Grinding, knocking, rattling or high-pitched squeals.
Possible cause: Loose bolts, worn parts, internal wear.
Quick Fix:
If noises persist, contact a professional to prevent further damage.
Tighten loose bolts
Inconsistent Power Output
Warning sign: Lights flicker, appliances act up or electronics restart unexpectedly.
Possible cause: Alternator wear, faulty voltage regulator or clogged fuel system.
Quick Fix:
Call a technician to test and adjust voltage output
Inspect wiring for damage
Replace blocked fuel filters
Visible Leaks
Warning signs: Oil, fuel or coolant pooling beneath your generator.
Possible Cause: Loose fittings, cracked hoses or worn gaskets.
Quick Fix:
- Shut down the unit immediately
- Identify and repair the source of the leak
- Never run your generator with a leak – it can cause major engine damage
Control Panel Errors
Warning signs: Flashing alerts or warning lights you’ve been ignoring
Possible Cause: Sensor issues, overdue maintenance or internal performance problems.
Quick Fix:
Resolve the issue immediately, as a seemingly small issue can escalate fast
Refer to your owner’s manual for error codes
Smoking Exhaust
Warning signs: Thick black, blue or white smoke coming from the exhaust.
Possible Cause: Fuel system failure, leaking coolant or oil burning.
Quick Fix:
If smoke continues, call a professional to prevent entire engine damage
Check oil and coolant levels
Replace clogged air filters
Pro Tip from GenPro
Routine generator maintenance is the secret to a generator that starts instantly and runs smoothly. At GenPro we recommend:
- Monthly start up checks
- Annual professional inspections
Our certified GenPro technicians are Houston’s trusted experts in generator repair, service and installation. We’ll keep your system running at peak performance so your home’s backup power supply is ready when you need it most.
Call us today at 346-478-6020 to schedule your generator service, and protect your home from being left in the dark