While modern HVAC systems are smart, they’ll still run into minor issues. They are still machinery after all, and often a simple reset can fix error codes and sensory issues. The common reaction to a new unit turning off on its own is always panic for many homeowners; however, the truth is that some problems are easier to fix than they look.
A quick reset often fixes minor HVAC problems, such as power surges or thermostat malfunctions. You don’t always need a technician to get things back to normal. This guide explains how to reset your AC quickly and safely.
TL;DRIf you have a reset button in your AC (relatively newer models), press it to reset. For ACs without a reset button (relatively older models), turn off the AC first through the thermostat. Then locate the breaker box and switch off the HVAC circuit breaker. Wait 30 minutes to allow a full reset. Finally, turn the thermostat back to “cool” and set it to 5° lower than room temperature. When resetting doesn’t work, you can perform other troubleshooting steps, like checking thermostat settings, air filters, tripped breakers, outdoor units, etc. Call a professional if the problem persists. |
How to Safely Reset an Air Conditioner Step-by-Step
Resetting an HVAC system doesn’t require any special tools, just a bit of patience and awareness. For initial troubleshooting, here’s how you can reset an AC very easily:
(Note that we still recommend calling in HVAC professionals for any kind of severe AC-related issues for proper diagnosis)
How to Reset an AC Unit with a Reset Button
Certain HVAC systems have a designated reset button on the device. Check your outside unit for this button to see if your system has it. It’s usually red and easily detectable.
All you have to do is press the button and wait for your AC unit to reset on its own. Do not turn on your HVAC system immediately. Give it some time.
In this case, your HVAC system will be in default settings when you turn it on.
How to Reset an AC Unit without a Reset Button
Now, if you are using an old HVAC system, chances are that you won’t have a reset button. Nothing to worry about, we have a manual guide for you to reset your HVAC system manually.
To manually reset your HVAC system, you should do the following:
1. Turn Off the Air Conditioner
Simply set the thermostat mode to “Off” or switch the system from “Cool” to “Off” using the thermostat’s control panel.
2. Search for the Breaker Box
A breaker box is a metal box or panel that is flush with the wall. It is often a simple metallic tint, though occasionally it is painted to match your house. Some older houses have fuse boxes instead of breaker panels.
Common locations include the garage, basement, hallway closets, laundry room, crawl spaces, or even on an exterior wall of your house near the utility meter.
3. Switch Off Your HVAC at the Circuit Breaker
Your HVAC system draws power from the circuit breaker. Once you locate the breaker, turn it to the “off” setting.
4. Wait 30 Minutes
Before reactivating your unit at the thermostat, wait for about half an hour. Your system has an opportunity to reset its internal circuit breaker if you do this.
5. Set the Thermostat to Cooling Mode
Carefully return your thermostat to “cool” settings after the recommended 30 minutes have passed. Set the system to a minimum of five degrees lower than the room’s current temperature to make sure everything is operating as it should.
What to Do If the Reset Doesn’t Work?
If your AC still malfunctions after a reset, don’t worry, it might just need expert attention. Green Leaf Air is always ready to help with fast, reliable service and free inspections. Meanwhile, take some other troubleshooting steps before making the call:
- Check the thermostat settings to see if it is in cooling mode.
- Inspect dirt in the air filter.
- Look for a tripped breaker.
- Check the outdoor unit for any leaves, dirt, or blockages.
- Listen if you can detect any unusual noises like clicking, buzzing, or humming.
- Check for airflow and warm air.
- Check for error codes if your unit has the feature.
- Inspect if there are any burning or musty odors.
When Should You Try Resetting It Yourself?
While resetting your HVAC system is straightforward, you should be aware of a few things before attempting a reset.
You should only try and reset your AC all by yourself when the problem you are facing seems minor and safe to handle. You would not want to damage your system further, and best to leave it to HVAC professionals to inspect.
A quick reset does the trick if you face the following problems:
- AC unit not working or unresponsive thermostat after a power outage
- If it was working fine yesterday, but suddenly won’t turn on today
- An error code or blinking lights without strange noises or smells
Always avoid pressing the reset button too quickly. If you are facing more problems (leaking water, warm air, burnt smell, loud noises, etc.), then have your local HVAC service provider look at it.
Conclusion
Resetting an AC fixes minor malfunctions that may occur anytime during operation. All you have to do is use the reset button or turn it off at the circuit breaker (with proper caution). However, don’t attempt any reset if you find or suspect major problems. Technicians at Green Leaf Air are always ready to respond to your calls anytime you find issues with your HVAC system or with maintenance plans, to avoid facing any issues altogether.
