Some models have the reset button located behind the service panel, which may require tools to remove. Reset buttons are usually red or yellow with a clear “reset” label. On window air conditioners, the reset button is usually on the control panel or located where the power cord connects to the base of the unit.
Use the Reset Button on AC Unit
Don't worry; the reset button might be able to solve the issue after a sudden disconnection or power outage. You can press the “Reset” button on the air conditioning unit, often shown as a small red button, to bring your air conditioning unit back to life.
There are a number of reasons why your air conditioner might be running but not cooling. It could be an issue with the thermostat, the compressor, or the evaporator coils. Or, it could simply be clogged with dust and debris, which is preventing it from working properly.
Turning off your AC when it's not cooling is more than a precaution; it's a necessary first step in troubleshooting and protecting your system from further damage. By understanding when to perform simple checks and when to call in the experts, you ensure your air conditioner remains a reliable refuge from the heat.
First, check your filters and coils for dirt and debris that may be impeding airflow. Once you've cleaned the filters and coils, run the air conditioner with just the fan so that the ice accumulation can melt off. If the AC still doesn't blow cold air, it could be that refrigerant levels are too low.
Once you locate the isolator, you may turn it off and wait for 30 minutes. The time allows for the appliance to dispel electrostatic charge. After half an hour, you can turn the lever your AC should restart without a problem. Once your AC is on, test it to determine if it's working.
In most cases, the small red reset button is inside the AC's compressor. If unsure, you can always refer to the user's manual to find the exact location.
Circuit breakers can be found in homes, businesses, and industrial facilities. They are typically located in the main electrical panel, which is typically located in the basement or garage.
To ensure that your portable air conditioner works effectively, it's essential to seal any gaps or cracks around windows and doors. These openings allow warm air from outside to enter your space, making it harder for the air conditioner to cool the room efficiently.
Here's how long some of the most common types of AC last:
Portable AC — 5-10 years. Residential single whole-home AC unit — 15 years. Central air-source heat pumps — 15 years (and up to 20–25 years if well-maintained and in a well insulated home) Ductless mini-split AC systems (heat pumps) — 20 years.
Instead, use a soft bristle brush or shop vac with a brush hose attachment to remove as much surface dirt or lint as possible. If you see a lot of oil or grease on the coils, you can use a chemical cleaner (after making sure it's non-acidic and safe for evaporator coil use) and gently rinse using a spray bottle.
check that the unit temperature setting is lower than the room temperature; check that the fan is blowing warm air from the back of the unit; check that you hear the compressor kick on after start up (could be a 3 minutes delay); check that the filter is clean and unit has not error messages.
Most modern thermostats will have a clearly marked reset button inside the panel. It's usually small and recessed, so you might need a pointed object like a paperclip to press it. For those wondering specifically how to reset air conditioner thermostat models, the process is generally the same.
Using a hygrometer you can test the expelled air temperature of your air conditioning. Run it for half and hour or so on maximum setting and you should reach a low temperature (16 to 18 degrees but different models may have varying lowest temperature).
Look for it first around on the exterior of your machine, especially along the bottom edge near the ground. An AC's reset button is typically red and visible, so it should be easy to spot. If you don't see a reset button on the outside, it could be located inside the unit behind the service panel.
Carrier air conditioner is not blowing cold air
Make sure your thermostat is set to “auto” and “cool.” Check if your air filter is clean. If not, replace your AC's air filter. If that doesn't solve the problem, your refrigerant may be low or there could be a leak in the evaporator coil.
Turn the Isolation Switch
It should look like a dial with an “on” and “off” position. Shut off your system by hitting the isolation switch, wait 30 to 60 minutes and then turn it back on. This manual reboot fully disconnects your AC unit from power, allowing all electrical components to reset.
Reset the AC Using the Isolation Switch
The isolation switch looks like an ordinary light switch with a knob. Once you locate it, turn the knob to the off position and leave it for at least 30 minutes up to an hour. This will allow the electrically operated components in the AC to reset.
Steps To Follow While Resetting Air Conditioner
One wrong step can cause greater damage. For this reason, follow a pattern while resetting your AC. Some ACs come with a reset button, while some don't. Most of the split AC systems have a reset button.
Check the thermostat
You should check if it's been set to the correct temperature and also make sure it's set to “cool”. If the AC settings are not right, it won't turn on. You can also check if the batteries in the thermostat are fresh and replace them if needed.
Yes, you should turn off your AC if it's not cooling.
The Hard Reset
This more robust action involves turning off the AC breaker in the electrical panel. After turning off the breaker, it's recommended to wait for at least one hour before restoring power. This extended period without power allows the system to reset entirely and can often resolve persistent problems.