When the power goes out, your generator should step in without hesitation. And when it doesn’t, frustration kicks in fast. Before you start assuming the worst, take a breath. There’s a good chance the issue is something simple.
At A1 Plus Electrical, Plumbing and Air, we know how scary these situations can feel. But don’t worry. We’ve helped plenty of folks with their generator troubles, and we’ve put together some troubleshooting steps that might get things moving again.
Then, if your generator is still not doing its job, you can reach out to us for professional repair because we’re Houston’s trusted generator installation crew. We also offer a range of other electrical services, such as home rewiring and circuit breaker installation, if the culprit of your backup power issues turns out not to be related to the generator itself. Now, let’s get into some troubleshooting tips!
Initial Safety Precautions
First things first, safety is paramount when dealing with a broken generator that’s acting up. The most important thing to do before starting any fix is to make sure the generator is completely off and preferably cooled down if it was recently running.
Work in a well-ventilated area, never indoors or in an attached garage, because generator exhaust contains dangerous carbon monoxide. Then, disconnect any appliances plugged directly into the generator before attempting diagnostics or repairs to prevent unexpected startup or electrical hazards.
Check the Fuel Supply
This might sound like an obvious step, but you’d be surprised how often it’s missed. Look in the tank. Is there fuel? If the tank’s empty or close to it, fill it up with fresh gasoline or natural gas, depending on your model.
Stale fuel can gum up the system, especially after long periods without use. If your generator has a fuel shutoff valve, confirm that it’s open. No fuel means no combustion, and no combustion means no electricity. It’s a simple check that can save you hours of head-scratching.
Inspect the Battery
Many modern generators rely on a battery to start the engine. If it’s been a while since the generator ran, the battery may have lost its charge. Look for corrosion on the terminals and make sure the connections are secure. If your generator uses a pull cord instead, skip this part — but if it has an electric start, a dead battery might be the culprit.
You can use a multimeter to check voltage or just try jump-starting it with a similar battery. If it clicks but doesn’t turn over, the odds are that the battery needs attention.
Review the Oil Level and Quality
Low oil levels can prevent your generator from starting. Most models come with a low-oil sensor, and when the oil drops below a certain point, the engine won’t fire up.
Use the dipstick to check both level and appearance. If the oil looks dark and sludgy or smells burnt, it’s time for a change. Old oil can clog internal parts and slow down combustion. A clean engine runs smoother and starts faster. Top it off or change it completely if you suspect old oil’s to blame.
Air Filter and Spark Plug Check
The spark plug plays a big role in getting your generator’s engine going. If it’s worn out or dirty, it might not ignite the fuel-air mix. Pull it out and take a good look. If it’s black, oily, or crusty, swap it out.
While you’re there, peek at the air filter. A clogged one limits airflow and can smother the engine. A fresh air filter helps keep combustion balanced. Changing both takes less than fifteen minutes and can make a big difference.
Look at the Choke and Carburetor
The choke helps your generator start when the engine’s cold. If the choke’s stuck open or closed, the engine might not fire up. Move it manually and see if that makes a difference.
Next, take a peek at the carburetor. This small but mighty part controls how fuel and air mix before heading into the engine. If you see grime or sludge in or around the carburetor, a cleaning or rebuild might be necessary. Fuel needs a clear path, and the carburetor makes that happen.
Check for Tripped Breakers or Blown Fuses
Your generator likely has its own circuit breaker or fuses meant to protect it from electrical overloads, and sometimes, these can trip or blow, preventing operation. Locate the circuit breaker switch (or switches) on the generator itself and see if it’s in the “off” or tripped position (often midway between on and off); reset it firmly to “on.”
Some models might use fuses, so check your manual for their location and inspect them for breaks in the filament. Don’t forget to check the main circuit breaker in your home’s electrical panel that controls the generator transfer switch circuit; a trip could also interrupt power flow or control signals.
When to Turn to a Licensed Electrician
If you’ve checked the basics — fuel, battery, oil, spark plug, air filter, carburetor — and the generator still won’t cooperate, it’s time to call in a pro. A licensed electrician can inspect deeper electrical issues, check internal wiring, or test voltage regulators. There might be a hidden leak, a damaged sensor, or a bad control board.
Trying to fix these parts without proper training could cause bigger problems or create a safety hazard. Getting professional help early prevents minor issues from turning into major repairs.
Call Now & Get Expert Generator Assistance!
Your generator not working during a power outage is the last thing you want. After all, you depend on that emergency power system for comfort and safety. If you’re in the Greater Houston area and your troubleshooting hasn’t solved the problem, give A1 Plus Electrical, Plumbing and Air a call.
Our experienced technicians understand both diesel engine and electric generator systems inside and out. From regular old wear and tear to fuel delivery issues and even complex electrical switch problems, we offer prompt, reliable service to diagnose and repair your system. Our goal is complete customer satisfaction, so we don’t leave until you feel happy and safe.
Contact us now to schedule your generator inspection!
