There are a few reasons why your Carrier outside AC unit may not be cutting off after the fan in the furnace has shut down.
1. The thermostat is set to "Fan On." This setting will keep the fan running even after the AC unit has turned off, which can help to improve air circulation throughout the house.
2. The AC unit is in "Cool On" mode. This mode will keep the AC unit running until the desired temperature is reached, regardless of whether the fan is running or not.
3. The AC unit is in "Auto" mode. This mode will automatically switch between "Cool On" and "Fan On" modes, depending on the temperature in the house.
4. The outside temperature is very hot. In some cases, the AC unit may need to run continuously in order to keep the house cool.
5. There is a problem with the AC unit. If none of the above reasons apply, there may be a problem with the AC unit itself. In this case, you will need to contact a qualified HVAC technician for assistance.
Troubleshooting Tips
If your Carrier outside AC unit is not cutting off, there are a few things you can try before contacting a technician:
1. Check the thermostat settings to make sure that the fan is not set to "On."
2. Change the AC unit to "Off" mode and then back to "Cool On" mode.
3. Turn the thermostat fan to the "Auto" position and ensure the mode selected is the “Cool” option.
4. Unplug the AC unit for a few minutes and then plug it back in.
5. Check the outside temperature to make sure that it is not too hot.
6. If the AC unit still does not cut off after trying these steps, you will need to contact a qualified HVAC technician for assistance.
