You can usually get power back quickly by resetting the automatic transfer switch, but always proceed with caution. Watch out for signs like a loud pop, smoke, or burned wires. If you notice loose screws or multiple appliances running, stop immediately. Safety is the top priority—do not attempt to reset the automatic transfer switch if you are unsure of what to do.
Key Takeaways
- Always put safety first by wearing safety gear and turning off all power before you reset the automatic transfer switch. – Follow the reset steps closely: find the switch, check for damage, turn off power, reset the switch by hand, and turn power back on one source at a time. – If the switch does not bring power back or looks damaged, stop and call a professional electrician. This helps you stay safe and makes sure the repair is done right.
Reset the Automatic Transfer Switch
Safety First
Before you reset the automatic transfer switch, you need to focus on safety. Working with electricity can be dangerous. Here are some important safety tips:
- Wear insulated gloves and safety glasses.
- Make sure you understand all power sources, breakers, and disconnects.
- Only qualified people should work on the ATS. If you feel unsure, stop and call a professional.
- Always disconnect the ATS from both the utility and generator before you do any manual work.
- Use external manual operators (EMOs) if your switch has them. This lets you operate the switch without opening the cabinet door.
- Follow safety standards like NFPA 70E and UL 1008.
⚠️ Tip: Never rush. Take your time and double-check everything before you touch any part of the system.
Find the Switch
You need to know where your automatic transfer switch is located. In most homes, you will find it near the main electrical panel or close to the generator. In commercial buildings, it is usually in the electrical distribution area, often between the utility source and the building’s load panels. Sometimes, it sits between the main panel and a sub-panel that serves essential loads. Look for a metal box labeled “Automatic Transfer Switch” or “ATS.”
- In homes with standby generators, the switch connects the generator to your main panel.
- In offices, it keeps important systems like lights and computers running during an outage.
Inspect Before Reset
Before you reset the automatic transfer switch, check for any signs of trouble. Use your eyes, ears, and nose. Here is a table of things to look for:
| Sign of Damage or Malfunction | What It Means |
|---|---|
| Tripped Circuit Breakers | Power surges may have tripped breakers. |
| Damaged Wires | Broken or loose wires can stop the ATS from working. |
| Bad Controller | The switch may not get the right signals to operate. |
| Dirt, Grime, or Moisture | These can cause parts to stick or fail. |
| Burned Smell or Smoke | This means serious damage—do not reset, call a pro. |
- Loose or swapped wires are a common reason for ATS failure.
- If you see any damage, do not try to reset the automatic transfer switch. Call a licensed electrician.
Power Down Sources
You must turn off all power sources before you reset the automatic transfer switch. This step keeps you and your equipment safe.
- Turn off all large electrical loads, like air conditioners and heaters.
- Shut down the generator if it is running.
- Disconnect shore power or utility power at the main breaker.
- Never start the generator while shore power is still connected.
- Make sure only one power source is connected at a time.
💡 Note: Turning off big appliances first helps prevent arcing and protects the ATS contacts.
Reset Steps
Most automatic transfer switches do not have a simple reset button. You will need to follow these steps:
- Double-check that all power sources are off.
- Open the ATS panel if it is safe to do so.
- Look for a manual operator handle or lever. Use it to move the switch from its current position to the opposite side (for example, from “Generator” to “Utility”).
- Wait a few seconds, then move the handle back to the normal position.
- Close the panel and secure it.
- Restore power sources one at a time. Start with the utility, then the generator if needed.
- Turn large appliances back on, one by one.
🛠️ Tip: If the switch feels stuck or you hear strange noises, stop and call a professional.
Check Power Restoration
After you reset the automatic transfer switch, you need to make sure power is back.
- Plug a portable power indicator into an outlet. If it lights up, power is restored.
- Check if lights and appliances work as expected.
- Some ATS units have visual indicators or lights that show the current power source.
- Smart home devices can send you a notification when power returns.
- Look outside to see if your neighbors have power or if streetlights are on.
- If you have voltage sensing relays, check their status.
You can also test the ATS by moving the manual operator handle from “Normal” to “Emergency” and back. The movement should be smooth. If everything works, you have successfully reset the automatic transfer switch.
✅ Note: Most ATS units restore power in about 30 seconds after a reset, but some systems may take a bit longer.
Troubleshooting
If Reset Fails
Sometimes, you might reset the automatic transfer switch and still not get power. Don’t worry. You can do a few quick checks before calling for help:
- Check if your home or building has utility power. Look at the main breaker or ask a neighbor if they have power.
- Make sure all circuit breakers are in the ON position. Flip any tripped breakers back on.
- Look for loose wires or connections inside the ATS panel. If you see anything loose, do not touch it. Just note what you see.
- Listen for any strange sounds, like buzzing or clicking. These can mean a problem inside the switch.
- Try turning off all large appliances again, then reset the automatic transfer switch one more time.
💡 Tip: If you smell something burning or see smoke, stop right away and call a professional.
When to Call a Pro
You should call a professional if you cannot restore power after these steps. Some problems need expert help. Here are common issues that require a trained technician:
- Loose electrical connections
- Worn-out parts inside the switch
- Calibration errors that affect timing
- Delays or failures when switching between power sources
- Control mechanism faults
Professionals have special training and certifications. They know how to fix and test transfer switches safely. Many experts complete hands-on courses and pass exams to work on this equipment. They also use the right safety gear and follow strict rules. Calling a pro keeps you safe and helps your system last longer.
You can get power back safely if you do these things: put on safety gear, turn off the generator, reset the breaker, and look for any damage. Always make safety your main goal. Keep a list of steps close by for next time.
If you are not sure what to do or the switch trips again, call a professional right away.
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FAQ
What should you do if the ATS keeps tripping?
You should check for overloaded circuits or damaged wires. If the problem happens again, call a licensed electrician for help.
Can you reset the ATS without turning off all power?
No, you must turn off all power sources first. This keeps you safe and protects your equipment from damage.
How often should you check your automatic transfer switch?
- Check your ATS every six months.
- Look for loose wires, dirt, or signs of wear.
- Regular checks help prevent bigger problems later.
The following information may be of interest to you
Why Won’t My Circuit Breaker Reset and What Can I Do?
What Are Automatic Transfer Switches and Their Key Functions
How to use ATS in conjunction with a generator
How to Safely Install an ATS for Backup Power
